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U.S. ZIP Code 50138
5-digit United States postal code #50138, Knoxville, IA
ZIP code 50138 is located in the city (place name) Knoxville, сounty Marion in the state of Iowa. The population in ZIP code 50138 is 11720 and the population density is 26.5. ZIP code 50138 refers to сounty Marion having сounty FIPS 19125, the ratio of people from different counties in this ZIP code is as follows: all county weights - 19125: 100%. In the area of the ZIP code 50138 valid time zone America/Chicago.