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Zip Code 81638 — Hamilton, CO

ZIP Code 81638 is associated with Hamilton, CO, in Moffat County. The listed population estimate is 69; estimated density is 0.1 people per square mile. Among records with population estimates, it ranks #4 of 4 in Moffat County and #491 of 512 in CO.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (40.305890, -107.642050)

Data MetricLocal Statistic
Postal / Zip Code81638
Primary CityHamilton
State / ProvinceCO
CountyMoffat
Total Population69
Population Density0.1 people/sq mi
TimezoneAmerica/Denver

How 81638 Compares

MetricZIP 81638Moffat County recordsCO records
Population estimate6913,220 (sum)5,862,421 (sum)
Population Density0.1 /sq mi----
County population rank#4 of 4----
State population rank#491 of 512----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in CO

ZIP CodeCityDistancePopulation estimate
ZIP 81641Meeker18.4 mi3,621
ZIP 81639Hayden25.9 mi2,618
ZIP 81625Craig28.0 mi12,307
ZIP 80469Phippsburg36.1 mi402
ZIP 80483Yampa40.0 mi455

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →