Powder River County, Montana ZIP Codes

Zip Code
City
Population ↓
59003Ashland1,334
59317Broadus1,108
59351Volborg202
59314Biddle155
59062Otter51
59343Olive21
59316Boyes15

Overview of ZIP Codes in Powder River 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 Powder River County, Montana (US Census).

Sources

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

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