Grant County, South Dakota ZIP Codes

10 ZIP Codes

Zip Code
City
Population ↓
57252Milbank4,883
57216Big Stone City1,584
57266Summit626
57259Revillo477
57256Ortley238
57251Marvin228
57265Strandburg202
57264Stockholm191
57269Twin Brooks186
57246Labolt132

Overview of ZIP Codes in Grant County

ZCTAs are geographic areas created by the US Census Bureau to approximate the delivery areas of ZIP Codes for statistical analysis. While ZCTAs use the same five-digit codes as ZIP Codes, they represent defined geographic areas that may not exactly match the mail delivery routes of ZIP Codes.
10
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 10 ZCTAs in Grant County, South Dakota (US Census).

Sources

  1. US Census: 2025 Gazetteer Files
  2. US Census: ZIP Code Tabulation Areas (ZCTAs)

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