Lake County, Montana ZIP Codes

12 ZIP Codes

Zip Code
City
Population ↓
59860Polson11,897
59911Bigfork9,493
59864Ronan7,301
59865Saint Ignatius3,635
59824Charlo1,526
59910Big Arm692
59915Elmo452
59855Pablo419
59914Dayton345
59931Rollins335
59929Proctor230
59863Ravalli146

Overview of ZIP Codes in Lake 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.
12
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 12 ZCTAs in Lake County, Montana (US Census).

Sources

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

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