ZIP codes in Corson County

15 ZIPs touch Corson County, South Dakota. The blue dashed line is the county border; orange ZIPs reach into it.

ZIP codes

cross the county line

10,883

people in these ZIPs

counties in SD

Most people

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Corson County ZIP list

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All 66 counties in South Dakota

Questions people actually ask

How many ZIP codes are in Corson County, South Dakota?

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

Which ZIP code in Corson County has the most people?

57601 (Mobridge) has about 3,422 residents, the most of any ZIP touching Corson County, in the Census Bureau’s ACS 2020–2024 estimates.

Can a ZIP code be in Corson 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 Corson 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