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U.S. ZIP Code 83421
5-digit United States postal code #83421, Chester, ID
ZIP code 83421 is located in the city (place name) Chester, сounty Fremont in the state of Idaho. The population in ZIP code 83421 is 319 and the population density is 8.6. ZIP code 83421 refers to сounty Fremont having сounty FIPS 16043, the ratio of people from different counties in this ZIP code is as follows: all county weights - 16043: 100%. In the area of the ZIP code 83421 valid time zone America/Boise.