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U.S. ZIP Code 50440
5-digit United States postal code #50440, Grafton, IA
ZIP code 50440 is located in the city (place name) Grafton, сounty Worth in the state of Iowa. The population in ZIP code 50440 is 422 and the population density is 5.2. ZIP code 50440 refers to сounty Worth having сounty FIPS 19195, the ratio of people from different counties in this ZIP code is as follows: all county weights - 19195: 100%. In the area of the ZIP code 50440 valid time zone America/Chicago.