ZIP Code 45040

Mason · Warren, Ohio

45040 is the ZIP code of Mason in Warren, Ohio, United States.

ZIP Code: 45040
County: Warren
State: Ohio
Country: United States

Place with ZIP code 45040

Place	County	Location
Mason	Warren	39.336, -84.315

Near Columbus

The nearest major city is Columbus, about 132 km away.

Local time
Weather forecast
Sunrise & sunset

Nearby ZIP codes

45005
45032
45034
45036
45039
45054
45065
45066
45068
45152
45162

All ZIP codes in Warren →

Frequently asked questions

Which places use ZIP code 45040?

Mason.

Which county and state is 45040 in?

Warren, Ohio, United States.

What is the nearest major city to 45040?

Columbus, about 132 km away.

Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.