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Where 81637 is
Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.
- 🔢 Type 81637 into a pocket calculator and turn it upside down: LEgIB — not quite a word, sorry.
- ➕ 81637 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 25, a total 2,242 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10011111011100101 - 🏠 Its numerical neighbours: 81636 (Battlement Mesa, CO, 54 mi away) and 81638 (Hamilton, CO, 46 mi away).
- 🔄 Backwards, 81637 becomes 73618, which is not a ZIP code at all.
- 👥 43 other ZIP codes are made of exactly the same digits (13678, 13687, 13786, 16738, 16837, 16873, …). The farthest-flung twin is 13786 in Harpersfield, NY, 1,687 miles away.
- 🧭 Farther north than 54% of all ZIP codes, and farther west than 84%.
- 🎯452 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 81637 and you would come out at 39.78°S, 72.89°E — 674 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 14h 59m of daylight. Shortest: 9h 21m.
- 📏 At 787.3 square miles of land, 81637 is bigger than 99% of ZIP codes — room for about 598 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 10,744This ZIP10,744 |
|---|---|
| Households | 3,348This ZIP3,348 |
| Housing units | 3,565This ZIP3,565 |
| Median age | 33.6This ZIP33.6Colorado37.7US 38.9 |
| Median household income | $109,209This ZIP$109,209Colorado$95,470US $80,734 |
| Median home value | $616,200This ZIP$616,200Colorado$539,400US $332,700 |
| Median gross rent | $2,140This ZIP$2,140Colorado$1,761US $1,413 |
| Bachelor's degree or higher | 30.3%This ZIP30.3% |
| Mean commute | 22.8 minThis ZIP22.8 min |
| Population density | 13.6 / sq miThis ZIP13.6 / sq mi |
Business and tax activity
| Business establishments | 417This ZIP417 |
|---|---|
| Employees | 3,178This ZIP3,178 |
| Annual payroll | $186,039,000This ZIP$186,039,000 |
| Tax returns filed | 4,380This ZIP4,380 |
| Total adjusted gross income | $352,563,000This ZIP$352,563,000 |
Land area
| Land area | 787.28 sq miThis ZIP787.28 sq mi |
|---|---|
| Water area | 4.77 sq miThis ZIP4.77 sq mi |
Counties 81637 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Garfield County | 53.8% |
| Eagle County | 46.2% |
Other place names in 81637
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 81637
| ZIP | City | Distance |
|---|---|---|
80426 | Burns, CO | 9.1 mi |
81601 | Glenwood Springs, CO | 18.1 mi |
81602 | Glenwood Springs, CO | 19.6 mi |
80479 | Toponas, CO | 20.2 mi |
81631 | Eagle, CO | 20.6 mi |
81655 | Wolcott, CO | 22.4 mi |
80463 | Mc Coy, CO | 23.2 mi |
80483 | Yampa, CO | 23.5 mi |
81647 | New Castle, CO | 26.5 mi |
81632 | Edwards, CO | 28.6 mi |
Find every ZIP code within 10 miles of 81637 →
Questions about this ZIP code
Where is ZIP code 81637?
81637 is in Gypsum, Colorado, in Garfield County, part of the Rifle, CO micropolitan area. Its published point location is 39.7778, -107.1058.
What county is 81637 in?
81637 spans 2 counties: Garfield County and Eagle County. Most of it falls in Garfield County, measured by overlapping land area — the county holding the most land in a ZIP code is not always the one holding the most residents.
What area code is 81637?
Gypsum uses area code 970, from NANPA's telephone records.
What time zone is 81637 in?
81637 uses America/Denver.
How many people live in 81637?
About 10,744 people live in ZIP code 81637, in 3,348 households, at 13.6 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.
What is the median household income in 81637?
$109,209 a year, against $95,470 across Colorado.
What ZIP codes are near 81637?
The closest are 80426 (9.1 mi), 81601 (18.1 mi), 81602 (19.6 mi), 80479 (20.2 mi) and 81631 (20.6 mi).
Is 81637 a PO Box ZIP code?
81637 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “81637 ZIP Code — Gypsum, Colorado (Garfield County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/81637
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/81637.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.