Hamilton, CO
Moffat County · Colorado · United States
Home to 94 people across 418.115 square miles.
At a glance
81638 by the numbers
Every figure below comes from the 2019–2023 American Community Survey 5-Year Estimates, the Census Gazetteer, or is computed from those. Margins of error are shown where they matter.
Location
Where 81638 is
| Coordinates | 40.300403, -107.642739 |
|---|---|
| Time zone | America/Denver |
| County | Moffat County |
| State | Colorado (CO) |
| Land area | 418.115 mi² |
| Coordinate source | Census ZCTA internal point |
Local time
America/Denver
Current weather
Live from the National Weather Service
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Distance to major cities
Straight-line, computed from coordinates
| Denver, CO | 145.6 mi |
|---|---|
| Phoenix, AZ | 532.8 mi |
| Los Angeles, CA | 725.0 mi |
| San Diego, CA | 743.5 mi |
People
Who lives in 81638
94 residents in 44 households, averaging 2.14 people per household. The largest age group is 65+ at 54.3% of residents, and 75.0% of households are families.
Age distribution
Share of residents by age band
Households
Composition and size
| Total households | 44 |
|---|---|
| Average household size | 2.14 |
| Family households | 75.0% |
| Living alone | 25.0% |
| Median age | 65.8 years |
| Households with internet | 81.8% |
Race & ethnicity
Census race categories. Hispanic or Latino origin is asked separately and overlaps these groups.
Income & work
What people earn in 81638
Income data is suppressed for this ZIP code.
Compared to the US
This ZIP against the national median
| Median household income | — ±— |
|---|---|
| Per capita income | $35,597 |
| Poverty rate | 29.8% |
| Unemployment rate | 0.0% |
| Labor force participation | 65.0% |
Household income distribution
Share of households in each bracket
Educational attainment among residents 25 and older: 51.2% hold a bachelor's degree or higher, 97.5% finished high school.
Housing
Homes and rent in 81638
Housing cost data is suppressed for this ZIP code.
Costs
Typical values
| Median home value | — |
|---|---|
| Median gross rent | —/mo |
| Median year built | 1978 |
| Housing units | 90 |
| Vacancy rate | 51.1% |
Own vs. rent
Of 44 occupied units
| Owner households | 38 |
|---|---|
| Renter households | 6 |
Building types
Units by structure size
Getting to work
How 81638 commutes
55.8% of workers worked from home, and the average one-way trip takes 5.0 minutes. 55.8% work from home.
Mode of transport
Workers 16 and older
Travel time
Mean commute 5.0 minutes
Overview
Understanding ZIP code 81638
ZIP code 81638 is assigned to Hamilton, CO, and falls within Moffat County. Like every US postal code, it began as a mail-routing device rather than a geographic boundary — the US Postal Service groups delivery routes under a single code so carriers and sorting equipment can process mail efficiently. Today it also serves as a practical shorthand for the area itself: roughly 94 people live inside it.
Living here
What life in Hamilton looks like
The building stock is dominated by detached single-family houses, which account for 91.1% of housing units here. The median construction year is 1978, making the housing here from the later twentieth century. The vacancy rate of 51.1% is high, which in many places reflects seasonal or second-home use rather than abandonment.
The population skews considerably older than the national median, with a median age of 65.8 against 42 nationally. The average household holds 2.14 people, and 75.0% are family households.
Getting to work takes 5.0 minutes on average one way. The dominant mode is worked from home at 55.8% of workers, while 44.2% walk, 55.8% work from home. Commute patterns are one of the better proxies for how a place actually functions day to day.
Where to stay
Where to stay in Hamilton, CO
81638 covers a rural area, and accommodation within the postal code itself is likely to be sparse — perhaps a country inn, a lodge or a vacation rental rather than a conventional hotel. Widening the search radius is usually the practical approach, and it also opens up more availability at short notice.
For reference, Denver, CO is about 145.6 miles away in a straight line, which is worth factoring in if you are comparing a stay here against one closer to the city centre.
Availability and pricing change constantly, so the live search below will give you a more accurate picture than any figure we could publish here. It opens results for this area on Booking.com.
Opens Booking.com in a new tab. We are not affiliated with Booking.com and receive nothing from this link.
Practical uses
What ZIP code 81638 is used for
Beyond addressing mail, 81638 does a lot of quiet administrative work. Retailers use it to calculate shipping and sales tax at checkout. Insurers use it to set premiums, since risk profiles vary geographically. Employers and marketers use it to define service areas. Government agencies use it to route benefits and organise reporting. If you have ever been asked for a postal code by a form that clearly does not intend to send you anything, this is why.
For anyone weighing a move, 81638 offers a compact profile of Hamilton: 94 residents, 51.2% of adults holding a bachelor's degree or higher, and an unemployment rate of 0.0%. A handful of figures like these answer more relocation questions than most neighbourhood guides do.
One caution worth repeating: a postal code is not a neighbourhood. 81638 may cover parts of several distinct areas, and a single neighbourhood in Hamilton may be split across more than one code. Boundaries also shift as USPS adjusts delivery routes. Treat the figures here as describing a delivery area, which is what they actually measure.
Nearby
ZIP codes near 81638
The eight closest postal codes by centroid distance, each with its own full profile. You can also browse every Colorado ZIP code or use the ZIP Express Lookup to search by city, county or time zone.
More in Moffat County
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Questions
Common questions about 81638
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Can ZIP code 81638 change?
Methodology
Where this data comes from
- Postal geography — GeoNames open postal code database (CC BY 4.0), cross-checked against the US Census Gazetteer.
- Demographics, income, housing, commute — US Census Bureau, American Community Survey 2019–2023 5-Year Estimates, ZIP Code Tabulation Area 81638. Tables B01001, B01002, B01003, B02001, B03003, B08301, B08303, B11001, B15003, B17001, B19001, B19013, B19301, B23025, B25002, B25003, B25024, B25035, B25064, B25077, B28002.
- Land and water area — US Census Bureau 2023 Gazetteer Files.
- Weather — NOAA National Weather Service, fetched live in your browser.
- Map — OpenStreetMap contributors (ODbL).