Grant County, Oregon ZIP Codes

11 ZIP Codes

Zip Code
City
Population ↓
97845John Day2,265
97820Canyon City1,568
97865Mount Vernon921
97869Prairie City838
97856Long Creek485
97825Dayville347
97864Monument316
97877Sumpter314
97848Kimberly217
97873Seneca109
97817Bates13

Overview of ZIP Codes in Grant 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.
11
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 11 ZCTAs in Grant County, Oregon (US Census).

Sources

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

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