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Where 81121 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 81121 into a pocket calculator and turn it upside down: IZIIB — not quite a word, sorry.
- ➕ As a number, 81,121 = 23 × 3527. Its digits add up to 13, a total 1,179 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10011110011100001 - 🏠 Its numerical neighbours: 81120 (Antonito, CO, 60 mi away) and 81122 (Bayfield, CO, 21 mi away).
- 🔄 Backwards, 81121 becomes 12118 — and that is a real ZIP code: Mechanicville, NY, 1,818 miles away.
- 👥 8 other ZIP codes are made of exactly the same digits (11218, 12118, 12181, 12811, 18211, 21811, …). The farthest-flung twin is 12181 in Troy, NY, 1,820 miles away.
- 🧭 Farther south than 64% of all ZIP codes, and farther west than 85%.
- 🎯516 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 81121 and you would come out at 37.02°S, 72.58°E — 860 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 14h 42m of daylight. Shortest: 9h 37m.
- 📏 At 4.5 square miles of land, 81121 is bigger than 18% of ZIP codes — room for about 3.4 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 376This ZIP376 |
|---|---|
| Households | 144This ZIP144 |
| Housing units | 230This ZIP230 |
| Median age | 54.1This ZIP54.1Colorado37.7US 38.9 |
| Median household income | $42,813This ZIP$42,813Colorado$95,470US $80,734 |
| Median home value | $332,000This ZIP$332,000Colorado$539,400US $332,700 |
| Bachelor's degree or higher | 16.5%This ZIP16.5% |
| Mean commute | 34.6 minThis ZIP34.6 min |
| Population density | 83.9 / sq miThis ZIP83.9 / sq mi |
Business and tax activity
| Business establishments | 6This ZIP6 |
|---|---|
| Employees | 29This ZIP29 |
| Annual payroll | $776,000This ZIP$776,000 |
Land area
| Land area | 4.48 sq miThis ZIP4.48 sq mi |
|---|---|
| Water area | 1.02 sq miThis ZIP1.02 sq mi |
Other place names in 81121
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 81121
| ZIP | City | Distance |
|---|---|---|
81137 | Ignacio, CO | 11.0 mi |
87419 | Navajo Dam, NM | 13.9 mi |
81122 | Bayfield, CO | 20.7 mi |
81303 | Durango, CO | 25.1 mi |
81147 | Pagosa Springs, CO | 26.2 mi |
87412 | Blanco, NM | 26.7 mi |
87410 | Aztec, NM | 28.5 mi |
81157 | Pagosa Springs, CO | 28.5 mi |
81302 | Durango, CO | 31.0 mi |
87528 | Dulce, NM | 33.9 mi |
Find every ZIP code within 10 miles of 81121 →
Questions about this ZIP code
Where is ZIP code 81121?
81121 is in Arboles, Colorado, in Archuleta County. Its published point location is 37.0169, -107.4198.
What county is 81121 in?
81121 lies in Archuleta County.
What area code is 81121?
Arboles uses area code 970, from NANPA's telephone records.
What time zone is 81121 in?
81121 uses America/Denver.
How many people live in 81121?
About 376 people live in ZIP code 81121, in 144 households, at 83.9 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 81121?
$42,813 a year, against $95,470 across Colorado.
What ZIP codes are near 81121?
The closest are 81137 (11 mi), 87419 (13.9 mi), 81122 (20.7 mi), 81303 (25.1 mi) and 81147 (26.2 mi).
Is 81121 a PO Box ZIP code?
81121 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “81121 ZIP Code — Arboles, Colorado (Archuleta County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/81121
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/81121.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.