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U.S. ZIP Code 81638
5-digit United States postal code #81638, Hamilton, CO
ZIP code 81638 is located in the city (place name) Hamilton, сounty Moffat in the state of Colorado. The population in ZIP code 81638 is 112 and the population density is 0.3. ZIP code 81638 refers to сounty Moffat having сounty FIPS 08081, the ratio of people from different counties in this ZIP code is as follows: all county weights - 08081: 100%. In the area of the ZIP code 81638 valid time zone America/Denver.