ZIP code 81638: Hamilton, CO
81638 is a ZIP code in Hamilton, Colorado, mainly in Moffat County, part of the Steamboat Springs, CO micro area. About 69 people live here.
- Population
- 69
- Median household income
- —
- Typical home value
- —
- Median rent
- —gross, per month
- Median age
- 72.7
- Homeowners
- 82.9%of occupied homes
Shaded: ZIP code 81638's area. Click anywhere on the map to see which ZIP code it's in.
ZIP codes within 10 milesWithin 25 miles
ZIP code 81638 details
| City | Hamilton |
|---|---|
| State | Colorado |
| County | Moffat County (also partly Routt County) |
| Metro area | Steamboat Springs, CO |
| Time zone | Mountain Time (UTC−7), observes daylight saving time |
| Type | Standard (delivery area) |
| Land area | 418.1 sq mi, plus 0.1 sq mi of water |
| Population density | 0 people per sq mi |
| Bachelor's degree or higher | 49.3% of adults 25+ |
| Center coordinates | 40.30040, -107.64274 |
ZIP codes near 81638
| ZIP code | City | Distance | Population |
|---|---|---|---|
| 81626 | Craig, CO | 15.7 mi | — |
| 81641 | Meeker, CO | 16.1 mi | 3,621 |
| 81639 | Hayden, CO | 27.7 mi | 2,618 |
| 81625 | Craig, CO | 28.4 mi | 12,307 |
| 80469 | Phippsburg, CO | 36.1 mi | 402 |
| 80483 | Yampa, CO | 40.0 mi | 455 |
| 80467 | Oak Creek, CO | 43.5 mi | 2,260 |
| 81633 | Dinosaur, CO | 43.9 mi | 0 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
About ZIP code 81638
What city is ZIP code 81638?
ZIP code 81638 is in Hamilton, CO, in Moffat County.
What county is ZIP code 81638 in?
81638 is mainly in Moffat County, Colorado, and partly in Routt County.
What is the population of ZIP code 81638?
About 69 people live in ZIP code 81638, according to the American Community Survey 2020–2024 5-year estimates.
What time zone is ZIP code 81638 in?
81638 is in Mountain Time (UTC−7). It observes daylight saving time.