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Where 80721 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 80721 into a pocket calculator and turn it upside down: IZLOB — not quite a word, sorry.
- ➕ As a number, 80,721 = 3 × 3 × 8969. Its digits add up to 18, a total 2,332 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10011101101010001 - 🏠 Its numerical neighbours: 80720 (Akron, CO, 69 mi away) and 80722 (Atwood, CO, 57 mi away).
- 🔄 Backwards, 80721 becomes 12708, which is not a ZIP code at all.
- 👥 67 other ZIP codes are made of exactly the same digits (01827, 02187, 02718, 02817, 02871, 07821, …). The farthest-flung twin is 02718 in East Taunton, MA, 1,610 miles away.
- 🧭 Farther north than 63% of all ZIP codes, and farther west than 81%.
- 🎯198 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 80721 and you would come out at 40.69°S, 77.85°E — 704 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 05m of daylight. Shortest: 9h 15m.
- 📏 At 88.5 square miles of land, 80721 is bigger than 75% of ZIP codes — room for about 67 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 257This ZIP257 |
|---|---|
| Households | 70This ZIP70 |
| Housing units | 70This ZIP70 |
| Median age | 22.1This ZIP22.1Colorado37.7US 38.9 |
| Median household income | $104,167This ZIP$104,167Colorado$95,470US $80,734 |
| Median home value | $326,100This ZIP$326,100Colorado$539,400US $332,700 |
| Bachelor's degree or higher | 11.2%This ZIP11.2% |
| Population density | 2.9 / sq miThis ZIP2.9 / sq mi |
Land area
| Land area | 88.48 sq miThis ZIP88.48 sq mi |
|---|---|
| Water area | 0.00 sq mi |
Other place names in 80721
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 80721
| ZIP | City | Distance |
|---|---|---|
69168 | Venango, NE | 9.9 mi |
80734 | Holyoke, CO | 13.7 mi |
80737 | Julesburg, CO | 14.5 mi |
80746 | Paoli, CO | 16.9 mi |
80744 | Ovid, CO | 17.9 mi |
69023 | Champion, NE | 19.5 mi |
69140 | Grant, NE | 22.5 mi |
80749 | Sedgwick, CO | 24.0 mi |
80731 | Haxtun, CO | 24.3 mi |
69033 | Imperial, NE | 25.8 mi |
Find every ZIP code within 10 miles of 80721 →
Questions about this ZIP code
Where is ZIP code 80721?
80721 is in Amherst, Colorado, in Phillips County. Its published point location is 40.6882, -102.1530.
What county is 80721 in?
80721 lies in Phillips County.
What area code is 80721?
Amherst uses area code 970, from NANPA's telephone records.
What time zone is 80721 in?
80721 uses America/Denver.
How many people live in 80721?
About 257 people live in ZIP code 80721, in 70 households, at 2.9 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 80721?
$104,167 a year, against $95,470 across Colorado.
What ZIP codes are near 80721?
The closest are 69168 (9.9 mi), 80734 (13.7 mi), 80737 (14.5 mi), 80746 (16.9 mi) and 80744 (17.9 mi).
Is 80721 a PO Box ZIP code?
80721 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “80721 ZIP Code — Amherst, Colorado (Phillips County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/80721
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/80721.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.