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Curated
Simple Crosstabs

United States Congressional Roll Call Voting Records, 1789-1990: Reformatted Data (ICPSR 9822)

Released/updated on: 2026-08-17
Geographic coverage: United States
Time period: 1789-01-01--1990-12-31
This study consists of roll call voting records from the United States Congress, including both the House of Representatives and Senate, from 1789 to 1990. The data is organized by distinct sessions of Congress, from 1st to 100th session of Congress. The units of analysis are individual members of Congress. Each record contains a member's voting action on every roll call vote taken during that session. The data also includes information associated with each record such as name, state, party code, ICPSR ID, member and occupancy codes, and Congress session number. The codebook files also contain supplemental information such as legislative citation codes, the voting date, the outcome tally, the relevant location, and a description of the voting issue.
Self-published

Spatial Distribution of State Capacity in Historical China, 200 BCE - 1900 CE (ICPSR 309570)

Released/updated on: 2026-08-14
Geographic coverage: China
Time period: 0220-01-01--1900-12-31

This study examines how demand for public goods shaped state-building in historical China. The dataset is a grid-cell–by-century panel dataset covering historical China from roughly the 2nd century BCE to the 19th century CE. Each observation is a ~1,000 km² grid cell (id_grid) in a given century (id_century). It combines multiple measures of state capacity (e.g., administrative center density, tax revenue, length of roads, number of post stations), potential drivers of state building (e.g., proximity to foreign-war frontline, proximity to the Yellow River, population density, distance to capital, and trade routes), and measures of local institutions (e.g., lineages, Buddhist temples, and ethnic-minority leadership). The dataset enables a quantitative analysis of the evolution of the state-locality relationship over time.

Curated
Simple Crosstabs

United States Historical Election Returns, 1824-1968 (ICPSR 1)

Released/updated on: 2025-10-21
Geographic coverage: United States
Time period: 1824-01-01--1968-12-31

Please read the collection notes below; there are many points to be aware of for this collection prior to analysis.

This collection of historical election data contains state files that list county-level returns for over 90 percent of all elections to the offices of president, governor, United States senator, and United States representative from 1824 through 1968. The data files include returns for all parties and candidates (as well as write-in and scattering votes if available for individual states), and for special elections as well as regularly-scheduled contests. Over 1,000 individual party names and many additional unaffiliated candidates are included.

Self-published

The Census Tree: Replication Files for 1900-1910 (ICPSR 193323)

Released/updated on: 2023-10-06
Geographic coverage: United States
Time period: 1900-01-01--1910-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. 
This project contains the files necessary to closely replicate the links between the 1900 and 1910 censuses. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1930-1940 (ICPSR 193232)

Released/updated on: 2023-09-14
Geographic coverage: United States
Time period: 1930-01-01--1940-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1920-1940 (ICPSR 193238)

Released/updated on: 2023-09-14
Geographic coverage: United States
Time period: 1920-01-01--1940-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1920-1930 (ICPSR 193239)

Released/updated on: 2023-09-14
Geographic coverage: United States
Time period: 1920-01-01--1930-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1910-1920 (ICPSR 193252)

Released/updated on: 2023-09-14
Geographic coverage: United States
Time period: 1910-01-01--1920-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1900-1910 (ICPSR 193253)

Released/updated on: 2023-09-14
Geographic coverage: United States
Time period: 1900-01-01--1910-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree: Machine Learning Models (ICPSR 193324)

Released/updated on: 2023-08-14
Geographic coverage: United States
Time period: 1850-01-01--1940-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. 
This folder includes all 36 machine learning models trained on Family Tree links for U.S. Census records from 1850 to 1940 (see Buckles, Haws, Price, and Wilbert (2023), available at https://censustree.org). We also include code to create features and obtain predicted match scores from a set of potential links.
Self-published

The Census Tree, 1900-1910, by Sex (ICPSR 193302)

Released/updated on: 2023-08-13
Geographic coverage: United States
Time period: 1900-01-01--1910-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1910-1920, by Sex (ICPSR 193305)

Released/updated on: 2023-08-13
Geographic coverage: United States
Time period: 1910-01-01--1920-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1920-1930, by Sex (ICPSR 193306)

Released/updated on: 2023-08-13
Geographic coverage: United States
Time period: 1920-01-01--1930-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1920-1940, by Sex (ICPSR 193307)

Released/updated on: 2023-08-13
Geographic coverage: United States
Time period: 1920-01-01--1940-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1930-1940, by Sex (ICPSR 193308)

Released/updated on: 2023-08-13
Geographic coverage: United States
Time period: 1930-01-01--1940-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1880-1900 (ICPSR 193251)

Released/updated on: 2023-08-11
Geographic coverage: United States
Time period: 1880-01-01--1900-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1900-1940 (ICPSR 193262)

Released/updated on: 2023-08-11
Geographic coverage: United States
Time period: 1900-01-01--1940-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1900-1930 (ICPSR 193263)

Released/updated on: 2023-08-11
Geographic coverage: United States
Time period: 1900-01-01--1930-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1900-1920 (ICPSR 193264)

Released/updated on: 2023-08-11
Geographic coverage: United States
Time period: 1900-01-01--1920-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1910-1940 (ICPSR 193265)

Released/updated on: 2023-08-11
Geographic coverage: United States
Time period: 1910-01-01--1940-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1910-1930 (ICPSR 193266)

Released/updated on: 2023-08-11
Geographic coverage: United States
Time period: 1910-01-01--1930-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1850-1910 (ICPSR 193221)

Released/updated on: 2023-08-10
Geographic coverage: United States
Time period: 1850-01-01--1910-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1850-1900 (ICPSR 193222)

Released/updated on: 2023-08-10
Geographic coverage: United States
Time period: 1850-01-01--1900-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1850-1880 (ICPSR 193223)

Released/updated on: 2023-08-10
Geographic coverage: United States
Time period: 1850-01-01--1880-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1850-1870 (ICPSR 193224)

Released/updated on: 2023-08-10
Geographic coverage: United States
Time period: 1850-01-01--1870-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1850-1860 (ICPSR 193225)

Released/updated on: 2023-08-10
Geographic coverage: United States
Time period: 1850-01-01--1860-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1860-1940 (ICPSR 193227)

Released/updated on: 2023-08-10
Geographic coverage: United States
Time period: 1860-01-01--1940-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1860-1930 (ICPSR 193228)

Released/updated on: 2023-08-10
Geographic coverage: United States
Time period: 1860-01-01--1930-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1860-1920 (ICPSR 193229)

Released/updated on: 2023-08-10
Geographic coverage: United States
Time period: 1860-01-01--1920-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1860-1910 (ICPSR 193230)

Released/updated on: 2023-08-10
Geographic coverage: United States
Time period: 1860-01-01--1910-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1860-1900 (ICPSR 193233)

Released/updated on: 2023-08-10
Geographic coverage: United States
Time period: 1860-01-01--1900-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1860-1880 (ICPSR 193234)

Released/updated on: 2023-08-10
Geographic coverage: United States
Time period: 1860-01-01--1880-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1860-1870 (ICPSR 193235)

Released/updated on: 2023-08-10
Geographic coverage: United States
Time period: 1860-01-01--1870-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1870-1940 (ICPSR 193236)

Released/updated on: 2023-08-10
Geographic coverage: United States
Time period: 1870-01-01--1940-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1870-1930 (ICPSR 193237)

Released/updated on: 2023-08-10
Geographic coverage: United States
Time period: 1870-01-01--1930-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1870-1920 (ICPSR 193243)

Released/updated on: 2023-08-10
Geographic coverage: United States
Time period: 1870-01-01--1920-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1870-1910 (ICPSR 193244)

Released/updated on: 2023-08-10
Geographic coverage: United States
Time period: 1870-01-01--1910-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1870-1900 (ICPSR 193245)

Released/updated on: 2023-08-10
Geographic coverage: United States
Time period: 1870-01-01--1900-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1870-1880 (ICPSR 193246)

Released/updated on: 2023-08-10
Geographic coverage: United States
Time period: 1870-01-01--1880-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1880-1940 (ICPSR 193247)

Released/updated on: 2023-08-10
Geographic coverage: United States
Time period: 1880-01-01--1940-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1880-1930 (ICPSR 193248)

Released/updated on: 2023-08-10
Geographic coverage: United States
Time period: 1880-01-01--1930-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1880-1920 (ICPSR 193249)

Released/updated on: 2023-08-10
Geographic coverage: United States
Time period: 1880-01-01--1920-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1880-1910 (ICPSR 193250)

Released/updated on: 2023-08-10
Geographic coverage: United States
Time period: 1880-01-01--1910-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1850-1940 (ICPSR 193187)

Released/updated on: 2023-08-09
Geographic coverage: United States
Time period: 1850-01-01--1940-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1850-1930 (ICPSR 193203)

Released/updated on: 2023-08-09
Geographic coverage: United States
Time period: 1850-01-01--1930-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
Self-published

The Census Tree, 1850-1920 (ICPSR 193205)

Released/updated on: 2023-08-09
Geographic coverage: United States
Time period: 1850-01-01--1920-12-31
The Census Tree is the largest-ever database of record links among the historical U.S. censuses, with over 700 million links for people living in the United States between 1850 and 1940. These links allow researchers to construct a longitudinal dataset that is highly representative of the population, and that includes women, Black Americans, and other under-represented populations at unprecedented rates. Each .csv file consists of a crosswalk between the two years indicated in the filename, using the IPUMS histids. For more information, consult the included Read Me file, and visit https://censustree.org.
External data

The Western History Collections Photographic Archives (ICPSR 38474)

Released/updated on: 2022-05-23
The Photographic Archives is the best known and most heavily used unit of the Western History Collections at the University of Oklahoma Libraries. It contains approximately 2 million images representing a wide variety of photographic processes and subjects, and contains both glass plate negatives and original prints. The core of the Photographic Archives consists of photographs of the University of Oklahoma; Native Americans in Oklahoma and the West; the development of Oklahoma cities and towns; and images of the range cattle industry in the West.
Curated
Simple Crosstabs

Massachusetts State Censuses, 1855-1915 (ICPSR 38179)

Released/updated on: 2022-03-09
Geographic coverage: United States, Massachusetts
Time period: 1855-01-01--1915-12-31
This is a compilation of the Massachusetts state censuses from 1855 to 1915. The results are given by state, county, and town. The references are taken from U.S. Department of Commerce, Bureau of the Census. U.S. Library of Congress, Reference Dept. State Censuses: an annotated bibliography of censuses of population taken after the year 1790 by States and Territories of the United States. Prepared by Henry J. Dubester, Chief, Census Library Project, Library of Congress. Washington, U.S. Government Printing Office, 1948. There was a special tabulation of the 1880 U.S. Census for Massachusetts with detailed town-level data. The state censuses of 1855, 1865, 1875, 1885, 1895, 1905, and 1915 are covered. The state census of 1925 had more limited information and was not included.
Curated
Partially restricted
Simple Crosstabs

China Multi-Generational Panel Dataset, Shuangcheng (CMGPD-SC), 1866-1913 (ICPSR 35292)

Released/updated on: 2021-10-14
Geographic coverage: Asia, China (Peoples Republic)
Time period: 1866-01-01--1913-12-31
The China Multi-Generational Panel Dataset - Shuangcheng (CMGPD-SC) provides longitudinal individual, household, and community information on the demographic and socioeconomic characteristics of a resettled population living in Shuangcheng, a county in present-day Heilongjiang Province of Northeastern China, for the period from 1866 to 1913. The dataset includes some 1.3 million annual observations of over 100,000 unique individuals descended from families who were relocated to Shuangcheng in the early 19th century. These families were divided into 3 categories based on their place of origin: metropolitan bannermen, rural bannermen, and floating bannermen. The CMGPD-SC, like its Liaoning counterpart, the CMGPD-LN (ICPSR 27063), is a valuable data source for studying longitudinal as well as multi-generational social and demographic processes. The population categories had salient differences in social origins and land entitlements, and landholding data are available at a number of time periods, thus the CMGPD-SC is especially suitable to the study of stratification processes.
Curated
Simple Crosstabs

Reichstag Biographical and Roll-Call Data, Germany, 1867-1890 (ICPSR 38004)

Released/updated on: 2021-04-29
Geographic coverage: Germany
Time period: 1867-03-01--1867-04-30, 1867-09-01--1870-12-31, 1871-03-01--1873-06-30, 1874-02-01--1876-12-31, 1877-03-01--1878-05-31, 1878-10-01--1881-06-30, 1881-12-01--1884-06-30, 1884-11-01--1887-01-31, 1887-03-01--1890-01-31

The Reichstag Biographical and Roll-Call Data includes coded biographical data for each deputy (Abgeordneter) for each session of the Reichstag during the defined voting period. It also includes a record of the vote of each deputy for every roll-call vote recorded in the official Reichstag stenographic record (Stengraphische Berichte). Biographical data was collected from the official handbooks of each session.

There are 9 datasets for the 9 Reichstag sessions that were held between 1867 and 1890. In addition to voting record, deputy demographic information includes political affiliation, religion, year of birth and death, education, and military service.

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