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Where 80540 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 80540 into a pocket calculator and turn it upside down: OhSOB — not quite a word, sorry.
- ➕ As a number, 80,540 = 2 × 2 × 5 × 4027. Its digits add up to 17, a total 2,133 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10011101010011100 - 🏠 Its numerical neighbours: 80539 (Loveland, CO, 21 mi away) and 80541 (Masonville, CO, 21 mi away).
- 🔄 Backwards, 80540 becomes 04508, which is not a ZIP code at all.
- 👥 27 other ZIP codes are made of exactly the same digits (04085, 04850, 05048, 05084, 05408, 05840, …). The farthest-flung twin is 04850 in Lincolnville Center, ME, 1,862 miles away.
- 🧭 Farther north than 58% of all ZIP codes, and farther west than 83%.
- 🎯362 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 80540 and you would come out at 40.22°S, 74.60°E — 666 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 02m of daylight. Shortest: 9h 18m.
- 📏 At 152.8 square miles of land, 80540 is bigger than 87% of ZIP codes — room for about 116 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 4,642This ZIP4,642 |
|---|---|
| Households | 2,025This ZIP2,025 |
| Housing units | 2,621This ZIP2,621 |
| Median age | 48.1This ZIP48.1Colorado37.7US 38.9 |
| Median household income | $139,521This ZIP$139,521Colorado$95,470US $80,734 |
| Median home value | $795,500This ZIP$795,500Colorado$539,400US $332,700 |
| Median gross rent | $2,112This ZIP$2,112Colorado$1,761US $1,413 |
| Bachelor's degree or higher | 60.5%This ZIP60.5% |
| Mean commute | 33.0 minThis ZIP33.0 min |
| Population density | 30.4 / sq miThis ZIP30.4 / sq mi |
Business and tax activity
| Business establishments | 160This ZIP160 |
|---|---|
| Employees | 849This ZIP849 |
| Annual payroll | $46,961,000This ZIP$46,961,000 |
| Tax returns filed | 2,340This ZIP2,340 |
| Total adjusted gross income | $281,257,000This ZIP$281,257,000 |
Land area
| Land area | 152.76 sq miThis ZIP152.76 sq mi |
|---|---|
| Water area | 0.50 sq miThis ZIP0.50 sq mi |
Counties 80540 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Boulder County | 65.3% |
| Larimer County | 34.7% |
Other place names in 80540
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 80540
| ZIP | City | Distance |
|---|---|---|
80306 | Boulder, CO | 8.5 mi |
80455 | Jamestown, CO | 9.0 mi |
80533 | Hygiene, CO | 9.3 mi |
80307 | Boulder, CO | 9.6 mi |
80314 | Boulder, CO | 9.6 mi |
80503 | Longmont, CO | 10.7 mi |
80510 | Allenspark, CO | 10.9 mi |
80481 | Ward, CO | 12.6 mi |
80308 | Boulder, CO | 13.6 mi |
80304 | Boulder, CO | 13.8 mi |
Find every ZIP code within 10 miles of 80540 →
Questions about this ZIP code
Where is ZIP code 80540?
80540 is in Lyons, Colorado, in Boulder County, part of the Boulder, CO metropolitan area. Its published point location is 40.2246, -105.4005.
What county is 80540 in?
80540 spans 2 counties: Boulder County and Larimer County. Most of it falls in Boulder 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 80540?
Lyons uses area codes 720, 303 and 983, from NANPA's telephone records.
What time zone is 80540 in?
80540 uses America/Denver.
How many people live in 80540?
About 4,642 people live in ZIP code 80540, in 2,025 households, at 30.4 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 80540?
$139,521 a year, against $95,470 across Colorado.
What ZIP codes are near 80540?
The closest are 80306 (8.5 mi), 80455 (9 mi), 80533 (9.3 mi), 80307 (9.6 mi) and 80314 (9.6 mi).
Is 80540 a PO Box ZIP code?
80540 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “80540 ZIP Code — Lyons, Colorado (Boulder County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/80540
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/80540.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.