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Where 81090 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 81090 into a pocket calculator and turn it upside down: OGOIB — not quite a word, sorry.
- ➕ As a number, 81,090 = 2 × 3 × 3 × 5 × 17 × 53. Its digits add up to 18, a total 2,332 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10011110011000010 - 🏠 Its numerical neighbours: 81089 (Walsenburg, CO, 135 mi away) and 81091 (Weston, CO, 151 mi away).
- 🔄 Backwards, 81090 becomes 09018, which is not a ZIP code at all.
- 👥 31 other ZIP codes are made of exactly the same digits (00918, 00981, 01089, 01098, 01890, 01908, …). The farthest-flung twin is 09810 in APO AE, a military post office, 7,167 miles away.
- 🧭 Farther south than 62% of all ZIP codes, and farther west than 81%.
- 🎯260 miles southwest of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 81090 and you would come out at 37.37°S, 77.77°E — 910 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 14h 44m of daylight. Shortest: 9h 35m.
- 📏 At 652.9 square miles of land, 81090 is bigger than 98% of ZIP codes — room for about 496 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 829This ZIP829 |
|---|---|
| Households | 494This ZIP494 |
| Housing units | 599This ZIP599 |
| Median age | 56.8This ZIP56.8Colorado37.7US 38.9 |
| Median household income | $46,389This ZIP$46,389Colorado$95,470US $80,734 |
| Median home value | $155,100This ZIP$155,100Colorado$539,400US $332,700 |
| Median gross rent | $583This ZIP$583Colorado$1,761US $1,413 |
| Bachelor's degree or higher | 27.7%This ZIP27.7% |
| Mean commute | 15.7 minThis ZIP15.7 min |
| Population density | 1.3 / sq miThis ZIP1.3 / sq mi |
Business and tax activity
| Business establishments | 18This ZIP18 |
|---|---|
| Employees | 115This ZIP115 |
| Annual payroll | $5,183,000This ZIP$5,183,000 |
| Tax returns filed | 370This ZIP370 |
| Total adjusted gross income | $20,649,000This ZIP$20,649,000 |
Land area
| Land area | 652.90 sq miThis ZIP652.90 sq mi |
|---|---|
| Water area | 0.19 sq miThis ZIP0.19 sq mi |
Other place names in 81090
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 81090
| ZIP | City | Distance |
|---|---|---|
81087 | Vilas, CO | 10.2 mi |
67862 | Manter, KS | 17.4 mi |
81084 | Two Buttes, CO | 17.5 mi |
67953 | Richfield, KS | 22.9 mi |
81029 | Campo, CO | 24.8 mi |
81073 | Springfield, CO | 26.4 mi |
67950 | Elkhart, KS | 28.9 mi |
67855 | Johnson, KS | 31.6 mi |
81041 | Granada, CO | 34.8 mi |
67954 | Rolla, KS | 36.0 mi |
Find every ZIP code within 10 miles of 81090 →
Questions about this ZIP code
Where is ZIP code 81090?
81090 is in Walsh, Colorado, in Baca County. Its published point location is 37.3659, -102.2305.
What county is 81090 in?
81090 lies in Baca County.
What area code is 81090?
Walsh uses area code 719, from NANPA's telephone records.
What time zone is 81090 in?
81090 uses America/Denver.
How many people live in 81090?
About 829 people live in ZIP code 81090, in 494 households, at 1.3 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 81090?
$46,389 a year, against $95,470 across Colorado.
What ZIP codes are near 81090?
The closest are 81087 (10.2 mi), 67862 (17.4 mi), 81084 (17.5 mi), 67953 (22.9 mi) and 81029 (24.8 mi).
Is 81090 a PO Box ZIP code?
81090 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “81090 ZIP Code — Walsh, Colorado (Baca County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/81090
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/81090.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.