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Where 80303 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 80303 into a pocket calculator and turn it upside down: EOEOB — not quite a word, sorry.
- ➕ As a number, 80,303 = 131 × 613. Its digits add up to 14, a total 1,416 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10011100110101111 - 🏠 Its numerical neighbours: 80302 (Boulder, CO, 8 mi away) and 80304 (Boulder, CO, 6 mi away).
- 🔄 Backwards, 80303 becomes 30308 — and that is a real ZIP code: Atlanta, GA, 1,225 miles away.
- 👥 14 other ZIP codes are made of exactly the same digits (03038, 03803, 03830, 08033, 08330, 30038, …). The farthest-flung twin is 03803 in Portsmouth, NH, 1,782 miles away.
- 🧭 Farther north than 56% of all ZIP codes, and farther west than 83%.
- 🎯351 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 80303 and you would come out at 39.97°S, 74.79°E — 685 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 01m of daylight. Shortest: 9h 20m.
- 📏 At 21.9 square miles of land, 80303 is bigger than 39% of ZIP codes — room for about 17 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 24,996This ZIP24,996 |
|---|---|
| Households | 11,783This ZIP11,783 |
| Housing units | 12,809This ZIP12,809 |
| Median age | 29.3This ZIP29.3Colorado37.7US 38.9 |
| Median household income | $78,555This ZIP$78,555Colorado$95,470US $80,734 |
| Median home value | $961,900This ZIP$961,900Colorado$539,400US $332,700 |
| Median gross rent | $1,910This ZIP$1,910Colorado$1,761US $1,413 |
| Bachelor's degree or higher | 80.1%This ZIP80.1% |
| Mean commute | 18.2 minThis ZIP18.2 min |
| Population density | 1,142.3 / sq miThis ZIP1,142.3 / sq mi |
Business and tax activity
| Business establishments | 944This ZIP944 |
|---|---|
| Employees | 8,830This ZIP8,830 |
| Annual payroll | $604,856,000This ZIP$604,856,000 |
| Tax returns filed | 10,970This ZIP10,970 |
| Total adjusted gross income | $1,610,035,000This ZIP$1,610,035,000 |
Land area
| Land area | 21.88 sq miThis ZIP21.88 sq mi |
|---|---|
| Water area | 0.93 sq miThis ZIP0.93 sq mi |
Other place names in 80303
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 80303
| ZIP | City | Distance |
|---|---|---|
80305 | Boulder, CO | 2.1 mi |
80027 | Louisville, CO | 3.1 mi |
80310 | Boulder, CO | 3.5 mi |
80309 | Boulder, CO | 4.3 mi |
80301 | Boulder, CO | 5.0 mi |
80025 | Eldorado Springs, CO | 5.8 mi |
80026 | Lafayette, CO | 6.4 mi |
80304 | Boulder, CO | 6.5 mi |
80007 | Arvada, CO | 7.4 mi |
80038 | Broomfield, CO | 7.4 mi |
Find every ZIP code within 10 miles of 80303 →
Questions about this ZIP code
Where is ZIP code 80303?
80303 is in Boulder, Colorado, in Boulder County, part of the Boulder, CO metropolitan area. Its published point location is 39.9732, -105.2093.
What county is 80303 in?
80303 lies in Boulder County.
What area code is 80303?
Boulder uses area codes 720, 303 and 983, from NANPA's telephone records.
What time zone is 80303 in?
80303 uses America/Denver.
How many people live in 80303?
About 24,996 people live in ZIP code 80303, in 11,783 households, at 1,142.3 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 80303?
$78,555 a year, against $95,470 across Colorado.
What ZIP codes are near 80303?
The closest are 80305 (2.1 mi), 80027 (3.1 mi), 80310 (3.5 mi), 80309 (4.3 mi) and 80301 (5 mi).
Is 80303 a PO Box ZIP code?
80303 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “80303 ZIP Code — Boulder, Colorado (Boulder County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/80303
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/80303.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.