ZIP codes in Osage County

15 ZIPs touch Osage County, Kansas. The blue dashed line is the county border; orange ZIPs reach into it.

ZIP codes

cross the county line

26,992

people in these ZIPs

105

counties in KS

Most people

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Osage County ZIP list

More counties in Kansas

All 105 counties in Kansas

Questions people actually ask

How many ZIP codes are in Osage County, Kansas?

15 ZIP codes reach into Osage County. 10 of them are only partly in the county and also cover a neighboring county.

Which ZIP code in Osage County has the most people?

66523 (Osage City) has about 3,941 residents, the most of any ZIP touching Osage County, in the Census Bureau’s ACS 2020–2024 estimates.

Can a ZIP code be in Osage County 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 Osage County. 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