Grant County, South Dakota ZIP codes
10 ZIP codes are in Grant County, plus 2 that cross in from neighboring counties.
- ZIP codes
- 10
- Population in these ZIPs
- 8,747
- Avg. median income
- $75,100population-weighted
- Cities & towns
- 10
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ZIP codes in Grant County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 57216 | Big Stone City | 1,584 | $88,203 | $257,900 |
| 57246 | Labolt | 132 | $72,917 | $90,000 |
| 57251 | Marvin | 228 | $72,292 | $75,000 |
| 57252 | Milbank | 4,883 | $70,479 | $234,400 |
| 57256 | Ortley | 238 | $66,500 | $225,000 |
| 57259 | Revillo | 477 | $80,250 | $259,800 |
| 57264 | Stockholm | 191 | $79,583 | $112,500 |
| 57265 | Strandburg | 202 | $69,519 | $114,600 |
| 57266 | Summit | 626 | $72,500 | $162,500 |
| 57269 | Twin Brooks | 186 | $98,333 | $410,600 |
ZIP codes partly in Grant County
These ZIP codes are mostly in a neighboring county but cover part of Grant County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 57227 | Corona | Roberts County | 562 | $96,500 | $192,900 |
| 57263 | South Shore | Codington County | 351 | $58,214 | $473,400 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Grant County
Nearby counties
Frequently asked questions
How many ZIP codes are in Grant County, South Dakota?
10 ZIP codes are mainly in Grant County, and 2 more ZIP codes from neighboring areas reach partly into it.
What cities are in Grant County?
ZIP codes in Grant County use the city names Big Stone City, Labolt, Marvin, Milbank, Ortley, Revillo, Stockholm, Strandburg, Summit and Twin Brooks.