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Where 81128 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 81128 into a pocket calculator and turn it upside down: BZIIB — not quite a word, sorry.
- ➕ As a number, 81,128 = 2 × 2 × 2 × 10141. Its digits add up to 20, a total 2,586 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10011110011101000 - 🏠 Its numerical neighbours: 81126 (Chama, CO, 70 mi away) and 81129 (Conejos, CO, 33 mi away).
- 🔄 Backwards, 81128 becomes 82118, which is not a ZIP code at all.
- 👥 7 other ZIP codes are made of exactly the same digits (12188, 18218, 18812, 18821, 88112, 88121, …). The farthest-flung twin is 12188 in Waterford, NY, 1,776 miles away.
- 🧭 Farther south than 64% of all ZIP codes, and farther west than 84%.
- 🎯475 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 81128 and you would come out at 37.08°S, 73.38°E — 862 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 14h 43m of daylight. Shortest: 9h 37m.
- 📏 At 145.1 square miles of land, 81128 is bigger than 86% of ZIP codes — room for about 110 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 34This ZIP34 |
|---|---|
| Households | 16This ZIP16 |
| Housing units | 73This ZIP73 |
| Median age | 65.7This ZIP65.7Colorado37.7US 38.9 |
| Median household income | $250,000+This ZIP$250,000+Colorado$95,470US $80,734 |
| Bachelor's degree or higher | 100.0%This ZIP100.0% |
| Population density | 0.2 / sq miThis ZIP0.2 / sq mi |
Business and tax activity
| Business establishments | 6This ZIP6 |
|---|---|
| Employees | 7This ZIP7 |
| Annual payroll | $853,000This ZIP$853,000 |
Land area
| Land area | 145.12 sq miThis ZIP145.12 sq mi |
|---|---|
| Water area | 0.10 sq miThis ZIP0.10 sq mi |
ZIP codes near 81128
| ZIP | City | Distance |
|---|---|---|
87520 | Chama, NM | 14.1 mi |
81120 | Antonito, CO | 17.0 mi |
87528 | Dulce, NM | 24.8 mi |
81157 | Pagosa Springs, CO | 25.1 mi |
87551 | Los Ojos, NM | 26.4 mi |
81147 | Pagosa Springs, CO | 29.3 mi |
81140 | La Jara, CO | 29.5 mi |
87575 | Tierra Amarilla, NM | 30.2 mi |
81124 | Capulin, CO | 31.7 mi |
81129 | Conejos, CO | 33.1 mi |
Find every ZIP code within 10 miles of 81128 →
Questions about this ZIP code
Where is ZIP code 81128?
81128 is in Chromo, Colorado, in Archuleta County. Its published point location is 37.0797, -106.6210.
What county is 81128 in?
81128 lies in Archuleta County.
What area code is 81128?
Chromo uses area code 719, from NANPA's telephone records.
What time zone is 81128 in?
81128 uses America/Denver.
How many people live in 81128?
About 34 people live in ZIP code 81128, in 16 households, at 0.2 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 81128?
$250,000+ a year, against $95,470 across Colorado.
What ZIP codes are near 81128?
The closest are 87520 (14.1 mi), 81120 (17 mi), 87528 (24.8 mi), 81157 (25.1 mi) and 87551 (26.4 mi).
Is 81128 a PO Box ZIP code?
81128 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “81128 ZIP Code — Chromo, Colorado (Archuleta County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/81128
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/81128.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.