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District of Columbia ZIP codes

All 277 ZIPs in District of Columbia, 20001 to 56972. Tap one on the map or in the list.

277

ZIP codes

681,294

people live in them

1

counties

220

PO Box & no-area ZIPs

Most people

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All 277 District of Columbia ZIP codes

ZIP codes by county

Pick a county for its ZIP list and map. Counts include ZIPs that only partly reach into the county.

Questions people actually ask

How many ZIP codes are in District of Columbia?

277 ZIP codes are in use in District of Columbia. 57 cover a delivery area, and 220 are PO Box, single-building or organization ZIPs with no area of their own.

What do District of Columbia ZIP codes start with?

District of Columbia ZIP codes start with these three-digit prefixes: 200, 202–205, 569. Each prefix is a mail sorting area run from one processing center.

Which District of Columbia ZIP code has the most people?

20002 in Washington has the most residents of any District of Columbia ZIP, about 72,397 people in the Census Bureau’s ACS 2020–2024 estimates.

Are these the official USPS ZIP code boundaries?

The map uses Census ZIP Code Tabulation Areas, the standard public stand-in for USPS delivery areas. They match for almost every home. For a mailing address, the USPS ZIP Code lookup has the final word.

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Updated 2026-11-10 · Where the data comes from