You are here
U.S. ZIP Code 45040
5-digit United States postal code #45040, Mason, OH
ZIP code 45040 is located in the city (place name) Mason, сounty Warren in the state of Ohio. The population in ZIP code 45040 is 50627 and the population density is 696.2. ZIP code 45040 refers to сounty Warren having сounty FIPS 39165, the ratio of people from different counties in this ZIP code is as follows: all county weights - 39165: 100%. In the area of the ZIP code 45040 valid time zone America/New_York.