Gregory County, South Dakota ZIP Codes

Zip Code
City
Population ↓
57533Gregory1,674
57523Burke1,041
57317Bonesteel573
57335Fairfax303
57538Herrick236
57571Saint Charles22

Overview of ZIP Codes in Gregory 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.
6
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 6 ZCTAs in Gregory County, South Dakota (US Census).

Sources

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

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