81151
ZIP 81151 is Sanford, Colorado, mostly in Costilla County; area code 719; Mountain time.
- Type
- Standard
- Time zone
- America/Denver
- County
- Costilla +1 more
- Metro area
- Alamosa, CO
- Population
- 1,716
- Coordinates
- 37.2391, -105.7116
Weather right now
Asking the National Weather Service…
Where 81151 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 81151 into a pocket calculator and turn it upside down: ISIIB — not quite a word, sorry.
- ➕ As a number, 81,151 = 7 × 11593. Its digits add up to 16, a total 1,922 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10011110011111111 - 🏠 Its numerical neighbours: 81149 (Saguache, CO, 69 mi away) and 81152 (San Luis, CO, 19 mi away).
- 🔄 Backwards, 81151 becomes 15118, which is not a ZIP code at all.
- 👥 3 other ZIP codes are made of exactly the same digits (11518, 11581, 11815). The farthest-flung twin is 11815 in Hicksville, NY, 1,731 miles away.
- 🧭 Farther south than 63% of all ZIP codes, and farther west than 83%.
- 🎯425 miles southwest of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 81151 and you would come out at 37.24°S, 74.29°E — 861 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 36m.
- 📏 At 293.1 square miles of land, 81151 is bigger than 95% of ZIP codes — room for about 222 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 1,716This ZIP1,716 |
|---|---|
| Households | 767This ZIP767 |
| Housing units | 848This ZIP848 |
| Median age | 40.6This ZIP40.6Colorado37.7US 38.9 |
| Median household income | $43,417This ZIP$43,417Colorado$95,470US $80,734 |
| Median home value | $188,500This ZIP$188,500Colorado$539,400US $332,700 |
| Median gross rent | $1,074This ZIP$1,074Colorado$1,761US $1,413 |
| Bachelor's degree or higher | 29.3%This ZIP29.3% |
| Mean commute | 30.0 minThis ZIP30.0 min |
| Population density | 5.9 / sq miThis ZIP5.9 / sq mi |
Business and tax activity
| Business establishments | 15This ZIP15 |
|---|---|
| Employees | 83This ZIP83 |
| Annual payroll | $3,266,000This ZIP$3,266,000 |
| Tax returns filed | 610This ZIP610 |
| Total adjusted gross income | $31,158,000This ZIP$31,158,000 |
Land area
| Land area | 293.07 sq miThis ZIP293.07 sq mi |
|---|---|
| Water area | 0.23 sq miThis ZIP0.23 sq mi |
Counties 81151 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Costilla County | 56.8% |
| Conejos County | 43.2% |
Other place names in 81151
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 81151
| ZIP | City | Distance |
|---|---|---|
81141 | Manassa, CO | 11.4 mi |
81123 | Blanca, CO | 14.3 mi |
81138 | Jaroso, CO | 15.6 mi |
81148 | Romeo, CO | 15.8 mi |
81101 | Alamosa, CO | 17.7 mi |
81152 | San Luis, CO | 18.8 mi |
81102 | Alamosa, CO | 18.8 mi |
81129 | Conejos, CO | 19.4 mi |
81126 | Chama, CO | 20.8 mi |
87524 | Costilla, NM | 20.9 mi |
Find every ZIP code within 10 miles of 81151 →
Questions about this ZIP code
Where is ZIP code 81151?
81151 is in Sanford, Colorado, in Costilla County, part of the Alamosa, CO micropolitan area. Its published point location is 37.2391, -105.7116.
What county is 81151 in?
81151 spans 2 counties: Costilla County and Conejos County. Most of it falls in Costilla 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 81151?
Sanford uses area code 719, from NANPA's telephone records.
What time zone is 81151 in?
81151 uses America/Denver.
How many people live in 81151?
About 1,716 people live in ZIP code 81151, in 767 households, at 5.9 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 81151?
$43,417 a year, against $95,470 across Colorado.
What ZIP codes are near 81151?
The closest are 81141 (11.4 mi), 81123 (14.3 mi), 81138 (15.6 mi), 81148 (15.8 mi) and 81101 (17.7 mi).
Is 81151 a PO Box ZIP code?
81151 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “81151 ZIP Code — Sanford, Colorado (Costilla County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/81151
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/81151.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.