Middletown, OH ZIP Codes
Middletown, Ohio has 3 ZIP codes: 3 for street addresses (, and ).
Your street decides which one you use.
Which Middletown ZIP code is my address in?
Street ranges from the Census Bureau, 2026. PO box and organization ZIP codes are not found by street. A new street may be missing: address not found?
Middletown ZIP code map
Tap or point to an area to see its ZIP code.Full-size map
Dashed line: Middletown city limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and place limits (2024).
All Middletown ZIP codes by type
| ZIP | Type and post office or station |
|---|---|
| 45005 | street delivery; mail may be addressed to Franklin Franklin |
| 45042 | street delivery Middletown |
| 45044 | street delivery Middletown |
Why your mail may say Middletown when you live outside it
Middletown ZIP codes also cover Franklin Township, Madison Township and Liberty Township, so a letter addressed to Middletown can go to a home outside the city limits.
A ZIP code does not set your city, school district or tax. Butler County property records show which city you are in.
Middletown ZIP code questions
What is the main ZIP code for Middletown?
45042, the ZIP code of the main Middletown post office at 320 N Verity Pkwy.
What county is Middletown in?
Butler County, with parts in Warren County.
ZIP codes for towns near Middletown
More towns near Middletown: Cincinnati, Fairborn, Huber Heights, Covington, Richmond, Florence, Springfield, Muncie, Grove City.
Sources and last checked
USPS ZIP Locale Detail (October 1, 2026), GeoNames (CC BY 4.0), U.S. Census Bureau, HUD-USPS crosswalk.
Checked October 20, 2026. Sources · How we build our lists · Corrections