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Alaska ZIP codes

All 273 ZIPs in Alaska, 99501 to 99950. Tap one on the map or in the list.

273

ZIP codes

735,134

people live in them

30

counties

28

PO Box & no-area ZIPs

Most people

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All 273 Alaska 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 Alaska?

273 ZIP codes are in use in Alaska. 245 cover a delivery area, and 28 are PO Box, single-building or organization ZIPs with no area of their own.

What do Alaska ZIP codes start with?

Alaska ZIP codes start with these three-digit prefixes: 995–999. Each prefix is a mail sorting area run from one processing center.

Which Alaska ZIP code has the most people?

99654 in Wasilla has the most residents of any Alaska ZIP, about 44,647 people in the Census Bureau’s ACS 2020–2024 estimates.

Which Alaska county has the most ZIP codes?

Yukon-Koyukuk Census Area touches 33 ZIP codes, the most of the 30 counties in Alaska. 12 Alaska ZIPs reach into more than one county.

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