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U.S. ZIP Code 61436
5-digit United States postal code #61436, Gilson, IL
ZIP code 61436 is located in the city (place name) Gilson, сounty Knox in the state of Illinois. The population in ZIP code 61436 is 951 and the population density is 6.0. ZIP code 61436 refers to сounty Knox having сounty FIPS 17095, the ratio of people from different counties in this ZIP code is as follows: all county weights - 17095: 100%. In the area of the ZIP code 61436 valid time zone America/Chicago.