U.S. Census Bureau, Population Estimates Program, Vintage 2025; source file and POPESTIMATE variable specified in each long row. Resident population, July 1 reference dates, January 1 2025 geography. Retrieved September 30, 2026. US Population Data publication snapshot pep-2025-r1, transformation 1. https://uspopulationdata.com/datasets/pep-2025/

Historical counts: U.S. Census Bureau, Historical Population Change Data (1910–2020), published April 26, 2021; historical geographic definitions. Retrieved September 30, 2026; retained collection census-history-r1. https://www.census.gov/data/tables/time-series/dec/popchange-data-text.html
