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U.S. ZIP Code 83251
5-digit United States postal code #83251, Mackay, ID
ZIP code 83251 is located in the city (place name) Mackay, сounty Custer in the state of Idaho. The population in ZIP code 83251 is 1097 and the population density is 0.4. ZIP code 83251 refers to сounty Custer having сounty FIPS 16037, the ratio of people from different counties in this ZIP code is as follows: all county weights - 16037: 100%. In the area of the ZIP code 83251 valid time zone America/Boise.