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District of Columbia county reference

1 counties and county equivalents in District of Columbia. Search names or FIPS codes, compare Census geography and keep the original sources with your work.

District of Columbia
District of Columbia · FIPS 11001
693,645 residents · 2025 estimate

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Use a county profile as a source-reading exercise or the geographic context for your own research. Keep the county FIPS identifier with your notes so that similarly named places in different states are not mixed.

The figures describe the county; they are not an evaluation of schools or an estimate of educational outcomes.

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Geography: 2025 U.S. Census Gazetteer. Population: Vintage 2025 estimates, July 1, 2025. County equivalents include parishes, boroughs, independent cities and planning regions. Puerto Rico population is not supplied by this population file.