Counties of District of Columbia

District of Columbia has 1 county, home to 693,645 people across 158 km². Each county below opens its full profile — Census Bureau and American Community Survey figures, and how it ranks against the rest of District of Columbia and the country.

Counties: 1
Population: 693,645; 2025 estimate; #49 of 51 states
Area: 158 km²; #51 of 51 states
Density: 4,381; per km²; #1 of 51 states

All counties

County	Population 2025	Area	Median income
District of Columbia	693,645	158 km²	$109,870

Compare District of Columbia's counties on a map, add layers and run a scatter — open the atlas, or browse all 3,144 US counties or all states.