Franklin County, Washington ZIP Codes

Zip Code
City
Population ↓
99301Pasco87,044
99326Connell6,336
99343Mesa3,215
99330Eltopia1,210
99335Kahlotus229

Overview of ZIP Codes in Franklin 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.
5
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 5 ZCTAs in Franklin County, Washington (US Census).

Sources

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

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