Dewey County, South Dakota ZIP Codes

7 ZIP Codes

Zip Code
City
Population ↓
57625Eagle Butte3,775
57601Mobridge3,422
57656Timber Lake1,000
57652Ridgeview265
57661Whitehorse177
57636Lantry104
57630Glencross11

Overview of ZIP Codes in Dewey 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.
7
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 7 ZCTAs in Dewey County, South Dakota (US Census).

Sources

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

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