Census of Population and Housing, 1980 [United States]: Congressional District Equivalency File (99th Congress) United States Department of Commerce. Bureau of the Census census data congressional districts population size ICPSR.I.A.1.c Congressional districts of the 99th Congress are matched to census geographic areas in this file. The areas used are those from the 1980 census. Each record contains geographic data, a congressional district code, and the total 1980 population count. Ten states were redistricted for the 99th Congress: California, Hawaii, Louisiana, Maine, Mississippi, Montana, New Jersey, New York, Texas, and Washington. The data for the other 40 states and the District of Columbia are identical to that for the 98th Congress. 1992-02-16 8404 10.3886/ICPSR08404.v1 United States 1985--1987 ICPSR metadata records are licensed under a Creative Commons Attribution-Noncommercial 3.0 United States License (http://creativecommons.org/licenses/by-nc/3.0/us/).