DISTRICT · DC
District of Columbia, District of Columbia
District of Columbia is a district in District of Columbia with FIPS code 11001 and an estimated population of 678,972 (Census 2023), 1st largest of 1 in the state.
County facts
- Name
- District of Columbia
- State
- District of Columbia
- Type
- district
- FIPS code
- 11001
- State FIPS
- 11
- Population (2023)
- 678,972
- Change since 2020
- +1.2%
- State rank
- 1 of 1
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for District of Columbia?
District of Columbia, District of Columbia has the five-digit FIPS code 11001: 11 for the state and 001 for the county.
What state is District of Columbia in?
District of Columbia is in District of Columbia.
How do I know if an address is in this county?
Use the address lookup. ZIP codes and city names can cross county lines, so an address is the reliable check.
Sources: U.S. Census Bureau geographic reference files; Census Bureau Population Estimates, Vintage 2023. Last reviewed 2026-10-27.