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ZIP codes in Yukon-Koyukuk Census Area

33 ZIPs touch Yukon-Koyukuk Census Area, Alaska. The blue dashed line is the county border; orange ZIPs reach into it.

33

ZIP codes

3

cross the county line

23,073

people in these ZIPs

30

counties in AK

Most people

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Yukon-Koyukuk Census Area ZIP list

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Questions people actually ask

How many ZIP codes are in Yukon-Koyukuk Census Area, Alaska?

33 ZIP codes reach into Yukon-Koyukuk Census Area. 3 of them are only partly in the county and also cover a neighboring county.

Which ZIP code in Yukon-Koyukuk Census Area has the most people?

99701 (Fairbanks) has about 18,061 residents, the most of any ZIP touching Yukon-Koyukuk Census Area, in the Census Bureau’s ACS 2020–2024 estimates.

Can a ZIP code be in Yukon-Koyukuk Census Area 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 Yukon-Koyukuk Census Area. 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