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U.S. ZIP Code 45820
5-digit United States postal code #45820, Cairo, OH
ZIP code 45820 is located in the city (place name) Cairo, сounty Allen in the state of Ohio. The population in ZIP code 45820 is 543 and the population density is 290.2. ZIP code 45820 refers to сounty Allen having сounty FIPS 39003, the ratio of people from different counties in this ZIP code is as follows: all county weights - 39003: 100%. In the area of the ZIP code 45820 valid time zone America/New_York.