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U.S. ZIP Code 74531
5-digit United States postal code #74531, Calvin, OK
ZIP code 74531 is located in the city (place name) Calvin, сounty Hughes in the state of Oklahoma. The population in ZIP code 74531 is 1062 and the population density is 3.2. ZIP code 74531 refers to сounty Hughes having сounty FIPS 40063, the ratio of people from different counties in this ZIP code is as follows: all county weights - 40063: 100%. In the area of the ZIP code 74531 valid time zone America/Chicago.