Cascade County, Montana ZIP Codes

15 ZIP Codes

Zip Code
City
Population ↓
59405Great Falls33,350
59404Great Falls28,822
59401Great Falls13,255
59421Cascade2,069
59412Belt1,685
59487Vaughn1,548
59414Black Eagle781
59485Ulm772
59443Fort Shaw705
59472Sand Coulee507
59477Simms334
59480Stockett328
59483Sun River247
59463Monarch142
59465Neihart39

Overview of ZIP Codes in Cascade 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.
15
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 15 ZCTAs in Cascade County, Montana (US Census).

Sources

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

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