Weather right now
Asking the National Weather Service…
Where 80304 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 80304 into a pocket calculator and turn it upside down: hOEOB — not quite a word, sorry.
- ➕ As a number, 80,304 = 2 × 2 × 2 × 2 × 3 × 7 × 239. Its digits add up to 15, a total 1,657 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10011100110110000 - 🏠 Its numerical neighbours: 80303 (Boulder, CO, 6 mi away) and 80305 (Boulder, CO, 5 mi away).
- 🔄 Backwards, 80304 becomes 40308, which is not a ZIP code at all.
- 👥 26 other ZIP codes are made of exactly the same digits (03048, 03084, 03804, 03840, 04038, 04083, …). The farthest-flung twin is 34008 in APO AA, a military post office, 2,635 miles away.
- 🧭 Farther north than 57% of all ZIP codes, and farther west than 83%.
- 🎯356 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 80304 and you would come out at 40.04°S, 74.71°E — 679 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 19m.
- 📏 At 9.0 square miles of land, 80304 is bigger than 26% of ZIP codes — room for about 6.9 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 25,383This ZIP25,383 |
|---|---|
| Households | 11,358This ZIP11,358 |
| Housing units | 11,952This ZIP11,952 |
| Median age | 42.8This ZIP42.8Colorado37.7US 38.9 |
| Median household income | $126,558This ZIP$126,558Colorado$95,470US $80,734 |
| Median home value | $1,210,200This ZIP$1,210,200Colorado$539,400US $332,700 |
| Median gross rent | $2,075This ZIP$2,075Colorado$1,761US $1,413 |
| Bachelor's degree or higher | 77.0%This ZIP77.0% |
| Mean commute | 18.6 minThis ZIP18.6 min |
| Population density | 2,812.2 / sq miThis ZIP2,812.2 / sq mi |
Business and tax activity
| Business establishments | 1,009This ZIP1,009 |
|---|---|
| Employees | 5,508This ZIP5,508 |
| Annual payroll | $338,751,000This ZIP$338,751,000 |
| Tax returns filed | 14,040This ZIP14,040 |
| Total adjusted gross income | $3,071,927,000This ZIP$3,071,927,000 |
Land area
| Land area | 9.03 sq miThis ZIP9.03 sq mi |
|---|---|
| Water area | 0.05 sq miThis ZIP0.05 sq mi |
Other place names in 80304
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 80304
| ZIP | City | Distance |
|---|---|---|
80309 | Boulder, CO | 2.3 mi |
80310 | Boulder, CO | 3.2 mi |
80302 | Boulder, CO | 3.5 mi |
80301 | Boulder, CO | 4.6 mi |
80305 | Boulder, CO | 5.1 mi |
80308 | Boulder, CO | 5.3 mi |
80307 | Boulder, CO | 5.4 mi |
80314 | Boulder, CO | 5.4 mi |
80306 | Boulder, CO | 6.5 mi |
80303 | Boulder, CO | 6.5 mi |
Find every ZIP code within 10 miles of 80304 →
Questions about this ZIP code
Where is ZIP code 80304?
80304 is in Boulder, Colorado, in Boulder County, part of the Boulder, CO metropolitan area. Its published point location is 40.0447, -105.2884.
What county is 80304 in?
80304 lies in Boulder County.
What area code is 80304?
Boulder uses area codes 720, 303 and 983, from NANPA's telephone records.
What time zone is 80304 in?
80304 uses America/Denver.
How many people live in 80304?
About 25,383 people live in ZIP code 80304, in 11,358 households, at 2,812.2 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 80304?
$126,558 a year, against $95,470 across Colorado.
What ZIP codes are near 80304?
The closest are 80309 (2.3 mi), 80310 (3.2 mi), 80302 (3.5 mi), 80301 (4.6 mi) and 80305 (5.1 mi).
Is 80304 a PO Box ZIP code?
80304 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “80304 ZIP Code — Boulder, Colorado (Boulder County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/80304
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/80304.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.