Postal reference / United States
81638Hamilton, Colorado
ZIP code 81638 is a United States postal code for Hamilton, Colorado. Its county association is Moffat County. The map reference point is at 40.325, -107.5841.
- State / territory
- Colorado
- Recorded place name
- Hamilton
- County association
- Moffat
- Estimated coordinate
- 40.325, -107.5841
View on OpenStreetMap - ZIP prefix
- 816 · 38 ZIP codes share it
- Data source
- GeoNames postal reference, snapshot September 26, 2026
GeoNames reference data. County associations may not include every intersecting county, place names are postal names rather than legal boundaries, and coordinates are approximate. This is not address validation.
Area
- Land area
- 418.115 sq mi (2023 Census Gazetteer)
Figures are for the ZIP Code Tabulation Area (ZCTA) that most closely matches this ZIP code, not an exact match to USPS delivery boundaries. Source: U.S. Census Bureau, 2023 Gazetteer + 2023 ACS 5-Year Estimates, retrieved 2026-09-27. How to read this data.
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Browse the other 644 ZIP codes recorded for Colorado, sorted by code with place and county.
Colorado directoryNearby ZIP code reference points
| ZIP code | Place | State | County association | Miles |
|---|---|---|---|---|
| 81626 | Craig | CO | Moffat | 13.3 |
| 81625 | Craig | CO | Moffat | 13.7 |
| 81639 | Hayden | CO | Routt | 20.8 |
| 81641 | Meeker | CO | Rio Blanco | 25.6 |
| 80469 | Phippsburg | CO | Routt | 33.5 |
| 80467 | Oak Creek | CO | Routt | 34.8 |
| 80483 | Yampa | CO | Routt | 37.9 |
| 80487 | Steamboat Springs | CO | Routt | 40.3 |
Straight-line distance between reference points. Nearby points do not prove that ZIP areas touch.
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