ZIP codes in Charles Mix County
10 ZIPs touch Charles Mix County, South Dakota. The blue dashed line is the county border; orange ZIPs reach into it.
10
ZIP codes
4
cross the county line
12,092
people in these ZIPs
66
counties in SD
Most people
Charles Mix County ZIP list
More counties in South Dakota
- Brookings County12
- Brown County19
- Brule County7
- Buffalo County6
- Butte County8
- Campbell County7
- Clark County13
- Clay County8
- Codington County10
- Corson County15
- Custer County8
- Davison County6
Questions people actually ask
How many ZIP codes are in Charles Mix County, South Dakota?
10 ZIP codes reach into Charles Mix County. 4 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Charles Mix County has the most people?
57380 (Wagner) has about 3,316 residents, the most of any ZIP touching Charles Mix County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Charles Mix 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 Charles Mix 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