Colusa County, California ZIP Codes

Zip Code
City
Population ↓
95932Colusa7,701
95987Williams6,786
95912Arbuckle4,855
95955Maxwell1,405
95979Stonyford558
95970Princeton453
95950Grimes287

Overview of ZIP Codes in Colusa 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 Colusa County, California (US Census).

Sources

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

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