ZIP codes in Matanuska-Susitna Borough
14 ZIPs touch Matanuska-Susitna Borough, Alaska. The blue dashed line is the county border; orange ZIPs reach into it.
14
ZIP codes
2
cross the county line
114,153
people in these ZIPs
30
counties in AK
Most people
Matanuska-Susitna Borough ZIP list
More counties in Alaska
- Juneau City and Borough7
- Kenai Peninsula Borough15
- Ketchikan Gateway Borough1
- Kodiak Island Borough8
- Kusilvak Census Area12
- Lake and Peninsula Borough14
- Nome Census Area14
- North Slope Borough10
- Northwest Arctic Borough11
- Petersburg Borough1
- Prince of Wales-Hyder Census Area14
- Sitka City and Borough1
Questions people actually ask
How many ZIP codes are in Matanuska-Susitna Borough, Alaska?
14 ZIP codes reach into Matanuska-Susitna Borough, including 2 PO Box or single-address ZIPs placed by the town they serve. 2 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Matanuska-Susitna Borough has the most people?
99654 (Wasilla) has about 44,647 residents, the most of any ZIP touching Matanuska-Susitna Borough, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Matanuska-Susitna Borough and another county?
Yes. ZIP codes follow mail routes, not county lines. Rows marked with a percentage show how much of that ZIP’s land is in Matanuska-Susitna Borough. For one address, pin the exact spot on the ZIP finder to see its county.
Where does this list come from?
ZIP areas and their county overlaps come from the Census Bureau’s 2020 ZIP Code Tabulation Area to county relationship file. PO Box ZIPs have no area, so each is placed in the county of the ZIP area nearest the town it serves.
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Updated 2026-11-10 · Where the data comes from