ZIP codes in Riley County
15 ZIPs touch Riley County, Kansas. The blue dashed line is the county border; orange ZIPs reach into it.
15
ZIP codes
8
cross the county line
119,759
people in these ZIPs
105
counties in KS
Most people
Riley County ZIP list
More counties in Kansas
- Pottawatomie County13
- Pratt County11
- Rawlins County10
- Reno County24
- Republic County13
- Rice County13
- Rooks County10
- Rush County10
- Russell County11
- Saline County10
- Scott County4
- Sedgwick County57
Questions people actually ask
How many ZIP codes are in Riley County, Kansas?
15 ZIP codes reach into Riley County, including 1 PO Box or single-address ZIPs placed by the town they serve. 8 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Riley County has the most people?
66502 (Manhattan) has about 43,693 residents, the most of any ZIP touching Riley County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Riley 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 Riley 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