State-Level Supplemental Nutrition Assistance Program Expansions During and After the COVID-19 Pandemic, United States, 2020-2023

New COVID measures archive data release from PIs Liwei Zhang, Ruijie Ma, and Orion Mowbray. This dataset contains a state-level record of Supplemental Nutrition Assistance Program (SNAP) expansions adopted during and post the COVID-19 pandemic across all 50 U.S. states and the District of Columbia. It documents the timing, scope, and implementation of major pandemic-related SNAP policies, including Emergency Allotments (EA), Pandemic-Electronic Benefit Transfer (P-EBT), and U.S. Department of Agriculture (USDA)-approved administrative waivers, between March 2020 and August 2023.