District of Columbia County Map
Labeled county boundary map and complete directory of all 1 county equivalent in District of Columbia (DC, State FIPS 11). View 5-digit FIPS codes, county seats, land area in square miles, and official county government websites below.
Showing all 1 county equivalent in District of Columbia. Use the search box below to filter by county name, 5-digit FIPS code, or county seat.
District of Columbia County Statistics & Summary
Total County Equivalent
1
Largest by Land Area
District of Columbia
Smallest by Land Area
District of Columbia
The District of Columbia is a single federal district (FIPS 11001) that serves as both a state equivalent and a county equivalent in U.S. Census Bureau tabulations.
All 1 County Equivalent in District of Columbia (FIPS, County Seat & Official Website)
| Federal District Name | 5-Digit FIPS | Seat / Administrative Center | Land Area (sq mi) | Coordinates | Official Website |
|---|---|---|---|---|---|
| District of Columbia | 11001 | — | 61.1 | 38.904°, -77.016° | Official Site |
How District of Columbia County Equivalent and 5-Digit FIPS Codes Work
In U.S. Census Bureau TIGER/Line geography, District of Columbia (DC) is assigned the 2-digit state Federal Information Processing Series (FIPS) code 11 and covers 61 square miles of land area across 1 county equivalent in the Eastern Time (ET) zone (with Washington, D.C. as the state capital). Every federal district in the directory above carries a unique 5-digit GEOID formed by combining state prefix 11 with a 3-digit county code (ranging alphabetically from District of Columbia at 11001 to District of Columbia at 11001).
Because U.S. Postal Service 5-digit ZIP Codes follow mail carrier delivery routes rather than local government borders, many postal addresses in District of Columbia carry a neighboring city’s mailing name or sit inside a multi-county ZIP Code Tabulation Area (ZCTA). Property tax assessments, deed recording, circuit and county court venue, voter registration precincts, sheriff jurisdiction, and county sales tax rates in District of Columbia are determined by the legal federal district boundary shown on the map above rather than the postal city name on an envelope.
Land area figures in square miles and internal centroid coordinates (INTPTLAT, INTPTLON) come directly from the U.S. Census Bureau’s current TIGERweb State_County benchmark, while 0 administrative seats and 1 verified official government websites are cross-referenced from Wikidata (CC0). Need a clean outline worksheet without county labels, or want to verify which District of Columbia federal district a specific home or business address sits in? Open the Blank Map of District of Columbia, run a street-segment check on Address to County Lookup, check multi-county postal overlap on ZIP Code to County Lookup, or browse all 50 states on the National U.S. County Map.
Adjacent State County Maps
Explore county maps and FIPS directories for states bordering District of Columbia: