Altona is a community in Boulder County, Colorado, home to about 587 people across 1.7 square miles. It has no ZIP code of its own: it’s part of 80302.
Homes sold for a median of $604 per square foot in the three months ending August 2026, a buyer’s market.
Mostly Boulder; part is in Altona
Each card is that ZIP code’s whole market, including any part outside Altona. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Altona’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Denver International Airport (DEN)34 miles away |
|---|---|
| Closer regional airport | Rocky Mountain Metropolitan Airport (BJC)12 miles away |
| Nearest city of 250,000+ | Denver, CO28 miles away |
| Nearest city of 1 million+ | Phoenix, AZ583 miles away |
Straight-line distances from the center of Altona; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Altona had 512 residents in the 2020 census, up 2% since 2010.
It’s the 272nd largest of 472 towns in Colorado by population.
Boulder County grew from 21,544 residents in 1900 to 330,758 in 2020.
Boulder County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 88°F in summer, and winter lows average 21°F. About 21.3 inches of rain and melted snow fall in a typical year, with about 93 inches of snow.
Source: NOAA 1991–2020 climate normals, Boulder, CO weather station (2 miles away).
159,619 jobs at 12,990 businesses in Boulder County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
555 doctors and other health care providers list an office in Altona.
Nearest hospitals
Providers with an office here
| Primary care doctors | 18 |
|---|---|
| Specialist doctors | 20 |
| Dentists | 40 |
| Nurse practitioners and physician assistants | 36 |
| Mental health providers | 368 |
| Physical and occupational therapists | 33 |
| Optometrists | 9 |
| Chiropractors | 31 |
| Pharmacies | 5 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (23 nearby)
Grocery stores (2 nearby)
Pharmacies (1 nearby)
Libraries (4 nearby)
Museums (6 nearby)
Theaters and performance venues (6 nearby)
Counts are within about 1 mile of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Public schools here are run by Boulder Valley School District No. Re2, Education Reenvisioned Boces. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| University Hill Elementary SchoolBoulder | Pre-K–5 | 405 | Public | 1.1 mi |
| Flatirons Elementary SchoolBoulder | K–5 | 163 | Public | 0.6 mi |
| Gold Hill Elementary SchoolGold Hill | K–5 | 10 | Public | 7.4 mi |
| Whittier Elementary SchoolBoulder | K–5 | 269 | Public | 0.9 mi |
| Williamsburg Academy of ColoradoBoulder | 6–12 | 622 | Public | 0.3 mi |
| Boulder High SchoolBoulder | 9–12 | 1,939 | Public | 0.7 mi |
| New Vista High SchoolBoulder | 9–12 | 327 | Public | 1.5 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Boulder, Lazy Acres, Sugarloaf, Tall Timber, Sunshine, Crisman, Seven Hills, Mountain Meadows and Gold Hill.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.