District of Columbia (DC) — CBSAs & ZIP Codes
About District of Columbia CBSAs
District of Columbia contains 1 Core Based Statistical Areas (CBSAs) as defined by the U.S. Office of Management and Budget. These include 1 Metropolitan Statistical Areas (populations of 50,000+) and 0 Micropolitan Statistical Areas (populations of 10,000-50,000).
The state has a total of 236 ZIP codes, with 236 located within CBSAs and 0 in rural areas not part of any statistical area. This data is based on the latest HUD-USPS ZIP Code Crosswalk and Census Bureau CBSA delineations.
Core Based Statistical Areas in District of Columbia
Metropolitan Statistical Areas
Sample ZIP Codes in District of Columbia
Showing a sample of ZIP codes. View all 236 ZIP codes →
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Frequently Asked Questions
What is a CBSA?
A Core Based Statistical Area (CBSA) is a U.S. geographic area defined by the Office of Management and Budget (OMB) based on commuting patterns and economic integration. CBSAs include both Metropolitan Statistical Areas (50,000+ population) and Micropolitan Statistical Areas (10,000-50,000 population).
Why are some ZIP codes not in any CBSA?
Rural ZIP codes that are not part of any Metropolitan or Micropolitan Statistical Area are classified as rural. These areas don't meet the population and commuting thresholds required for CBSA designation.
Can CBSAs cross state boundaries?
Yes, many CBSAs span multiple states. For example, the New York-Newark-Jersey City MSA includes portions of New York, New Jersey, and Pennsylvania. When viewing state data, you'll see all CBSAs that have any ZIP codes within that state.