Alaska ZIP codes
Alaska holds 273 ZIP codes between 99501 and 99950. The tables rank the places and counties with the most codes; the guide below decodes the numbering.
Places with the most ZIP codes in Alaska
| Place | ZIP codes |
|---|---|
| Anchorage | 25 |
| Fairbanks | 10 |
| Juneau | 6 |
| Wasilla | 4 |
| Kodiak | 3 |
| Jber | 2 |
| Ketchikan | 2 |
| Akutan | 1 |
| Cold Bay | 1 |
| False Pass | 1 |
| King Cove | 1 |
| Sand Point | 1 |
| Adak | 1 |
| Atka | 1 |
| Saint George Island | 1 |
| Nikolski | 1 |
| Saint Paul Island | 1 |
| Unalaska | 1 |
| Dutch Harbor | 1 |
| Indian | 1 |
Alaska counties by ZIP count
| County | ZIP codes |
|---|---|
| Anchorage Municipality | 31 |
| Yukon-Koyukuk (CA) | 30 |
| Bethel Census Area | 27 |
| Fairbanks North Star | 16 |
| Kenai Peninsula | 15 |
| Nome (CA) | 14 |
| Kusilvak | 12 |
| Lake and Peninsula | 12 |
| Matanuska-Susitna Borough | 12 |
| Northwest Arctic | 11 |
Reading a Alaska ZIP code
Alaska holds 273 ZIP codes between 99501 and 99950, spread over 30 counties. Anchorage leads the state with 25 codes, ahead of Fairbanks with 10. Every code here opens with the digit 9: that opening number is the national postal region Alaska belongs to, the next two digits name the sectional center that sorts the mail, and the final two point to the local office. A ZIP+4 suffix narrows delivery to a block face. Boundaries follow carrier routes rather than city limits, which is why Anchorage spreads across 25 codes while some rural codes cross county lines.
Source: GeoNames postal dataset (CC BY 4.0), snapshot of 2026-07-09. Counts cover standard delivery ZIPs listed for Alaska; unique and PO box codes may add to these totals.
Last updated: · Methodology and sources