80031
ZIP 80031 is in Westminster, Colorado, mostly in Adams County; area codes 303, 720 and 983; Mountain time. Westminster has 4 ZIP codes; the others are 80030, 80035 and 80036.
- Type
- Standard
- Time zone
- America/Denver
- County
- Adams +1 more
- Metro area
- Denver-Aurora-Centennial, CO
- Population
- 35,584
- Coordinates
- 39.8739, -105.0388
Weather right now
Asking the National Weather Service…
Where 80031 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 80031 into a pocket calculator and turn it upside down: IEOOB — not quite a word, sorry.
- ➕ As a number, 80,031 = 3 × 7 × 37 × 103. Its digits add up to 12, a total 940 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10011100010011111 - 🏠 Its numerical neighbours: 80030 (Westminster, CO, 3 mi away) and 80033 (Wheat Ridge, CO, 8 mi away).
- 🔄 Backwards, 80031 becomes 13008, which is not a ZIP code at all.
- 👥 34 other ZIP codes are made of exactly the same digits (00831, 01038, 01083, 01380, 01803, 01830, …). The farthest-flung twin is 00831 in St John, VI, 2,815 miles away.
- 🧭 Farther north than 55% of all ZIP codes, and farther west than 83%.
- 🎯343 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 80031 and you would come out at 39.87°S, 74.96°E — 695 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 00m of daylight. Shortest: 9h 20m.
- 📏 At 8.4 square miles of land, 80031 is bigger than 25% of ZIP codes — room for about 6.4 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 35,584This ZIP35,584 |
|---|---|
| Households | 14,529This ZIP14,529 |
| Housing units | 15,265This ZIP15,265 |
| Median age | 39.5This ZIP39.5Colorado37.7US 38.9 |
| Median household income | $107,422This ZIP$107,422Colorado$95,470US $80,734 |
| Median home value | $535,300This ZIP$535,300Colorado$539,400US $332,700 |
| Median gross rent | $1,994This ZIP$1,994Colorado$1,761US $1,413 |
| Bachelor's degree or higher | 45.1%This ZIP45.1% |
| Mean commute | 27.7 minThis ZIP27.7 min |
| Population density | 4,222.1 / sq miThis ZIP4,222.1 / sq mi |
Business and tax activity
| Business establishments | 770This ZIP770 |
|---|---|
| Employees | 7,972This ZIP7,972 |
| Annual payroll | $338,738,000This ZIP$338,738,000 |
| Tax returns filed | 20,000This ZIP20,000 |
| Total adjusted gross income | $1,824,766,000This ZIP$1,824,766,000 |
Land area
| Land area | 8.43 sq miThis ZIP8.43 sq mi |
|---|---|
| Water area | 0.05 sq miThis ZIP0.05 sq mi |
Counties 80031 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Adams County | 89.9% |
| Jefferson County | 10.1% |
Other place names in 80031
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 80031
| ZIP | City | Distance |
|---|---|---|
80260 | Denver, CO | 2.0 mi |
80035 | Westminster, CO | 2.6 mi |
80036 | Westminster, CO | 2.6 mi |
80030 | Westminster, CO | 3.0 mi |
80234 | Denver, CO | 3.1 mi |
80003 | Arvada, CO | 3.6 mi |
80038 | Broomfield, CO | 4.1 mi |
80021 | Broomfield, CO | 4.1 mi |
80221 | Denver, CO | 4.3 mi |
80020 | Broomfield, CO | 4.4 mi |
Find every ZIP code within 10 miles of 80031 →
Questions about this ZIP code
Where is ZIP code 80031?
80031 is in Westminster, Colorado, in Adams County, part of the Denver-Aurora-Centennial, CO metropolitan area. Its published point location is 39.8739, -105.0388.
What county is 80031 in?
80031 spans 2 counties: Adams County and Jefferson County. Most of it falls in Adams 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 80031?
Westminster uses area codes 303, 720 and 983, from NANPA's telephone records.
What time zone is 80031 in?
80031 uses America/Denver.
How many people live in 80031?
About 35,584 people live in ZIP code 80031, in 14,529 households, at 4,222.1 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 80031?
$107,422 a year, against $95,470 across Colorado.
What ZIP codes are near 80031?
The closest are 80260 (2 mi), 80035 (2.6 mi), 80036 (2.6 mi), 80030 (3 mi) and 80234 (3.1 mi).
Is 80031 a PO Box ZIP code?
80031 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “80031 ZIP Code — Westminster, Colorado (Adams County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/80031
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/80031.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.