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U.S. ZIP Code 52321
5-digit United States postal code #52321, Onslow, IA
ZIP code 52321 is located in the city (place name) Onslow, сounty Jones in the state of Iowa. The population in ZIP code 52321 is 404 and the population density is 5.2. ZIP code 52321 refers to сounty Jones having сounty FIPS 19105, the ratio of people from different counties in this ZIP code is as follows: all county weights - 19105: 100%. In the area of the ZIP code 52321 valid time zone America/Chicago.