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U.S. ZIP Code 61840
5-digit United States postal code #61840, Dewey, IL
ZIP code 61840 is located in the city (place name) Dewey, сounty Champaign in the state of Illinois. The population in ZIP code 61840 is 709 and the population density is 8.2. ZIP code 61840 refers to сounty Champaign having сounty FIPS 17019, the ratio of people from different counties in this ZIP code is as follows: all county weights - 17019: 100%. In the area of the ZIP code 61840 valid time zone America/Chicago.