Warren County, Ohio ZIP Codes

12 ZIP Codes

Zip Code
City
Population ↓
45040Mason59,518
45036Lebanon42,204
45005Franklin32,251
45039Maineville28,335
45066Springboro27,545
45152Morrow14,850
45068Waynesville11,597
45065South Lebanon7,053
45162Pleasant Plain2,754
45054Oregonia2,693
45034Kings Mills968
45032Harveysburg683

Overview of ZIP Codes in Warren 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 Warren County, Ohio (US Census).

Sources

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

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