District of Columbia Counties by Population (2026)

2026 Pop.

696K

Top 5 Most Populous Counties

District of Columbia flag District of Columbia

695,980

County
2026 Pop. ↓
Area (mi²)
Density (/mi²)
Change (2020)
District of Columbia695,9806111,4103.73%

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)