STATE ยท DC
Counties in District of Columbia
District of Columbia has 1 county equivalent. The most populous is District of Columbia with 678,972 people (Census 2023 estimate). Some are district rather than counties.
| County | Type | FIPS | Population (2023) |
|---|---|---|---|
| District of Columbia | district | 11001 | 678,972 |
Sources: U.S. Census Bureau geographic reference files; Census Bureau Population Estimates, Vintage 2023. Last reviewed 2026-10-27. Looking for yours? Find your county.