Boulder
City in Boulder County, Colorado

Boulder is a city in Boulder County, Colorado, with 108,250 residents (2020 Census). It sits at 5,430 ft (1,655 m) above sea level. The nearest town is Valmont, 2.5 miles E.
- 108,250residents (2020 Census)
- 5,430 ftelevation · 1,655 m
- 27.0 sq miland area · 69.9 km²
- 4,013 / sq mipopulation density
- 80310main ZIP code (4 in total)
About Boulder
Boulder is a home rule city that is the county seat of, and the most populous municipality in, Boulder County, Colorado, United States. With a population of 108,250 at the 2020 census, it is the 12th-most populous city in Colorado. Boulder is the primary city of the Boulder metropolitan area, which had 330,758 residents in 2020, and is part of the Front Range Urban Corridor.
Boulder is located at the base of the foothills of the Rocky Mountains, at an elevation of 5,430 feet (1,655 m) above sea level. The city is 25 miles (40 km) northwest of the Colorado state capital of Denver. Boulder is a college town, hosting the University of Colorado Boulder, the flagship and largest campus of the University of Colorado system, as well as numerous research institutes. Starting in 2027, Boulder will become the new home of the Sundance Film Festival.
Text: Wikipedia · CC BY-SA 4.0
Boulder weather: 7-day forecast
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Live webcams in Boulder
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Living in Boulder
- Median household income
- $87,493
- Median home value
- $1,039,500
- Median rent
- $2,018/mo
- Median age
- 28.8
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Map of Boulder
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Open in Google Maps ›Boulder, CO population
Boulder had 108,250 residents in the 2020 Census.
| 2020 Census | 108,250 |
|---|---|
| Density | 4,013 per sq mi (1,550 per km²) |
Source: U.S. Census Bureau, Decennial Census.
Boulder at a glance
| State | Colorado (CO) |
|---|---|
| County | Boulder County |
| Type | City |
| Population | 108,250 (2020) |
| Land area | 26.97 sq mi (69.9 km²) |
| Water area | 1.05 sq mi (2.72 km²) |
| Elevation | 5,430 ft (1,655 m) |
| Coordinates | 40.0244° N, 105.2513° W |
| ZIP codes | 80310, 80301, 80304, 80305 |
| Official website | bouldercolorado.gov |
| Census code (GEOID) | 0807850 |
Sources: U.S. Census Bureau (Gazetteer, ZCTA), USGS GNIS, Wikidata.
Towns near Boulder
- Valmont2.5 mi E
- Pine Brook Hill3.1 mi W
- Seven Hills4.3 mi W
- Paragon Estates4.6 mi SE
- Gunbarrel5.0 mi NE
- Tall Timber5.3 mi W
- Eldorado Springs5.9 mi S
- Lazy Acres6.1 mi NW
- Crisman6.5 mi W
- Sunshine6.8 mi NW
- Niwot6.9 mi NE
- Louisville6.9 mi SE
Straight-line distance between town centers.
Frequently asked questions about Boulder
What county is Boulder in?
Boulder is in Boulder County, Colorado.
What is the population of Boulder, CO?
108,250 people lived in Boulder at the 2020 Census.
What is the ZIP code of Boulder, CO?
The main ZIP code is 80310. Other ZIP codes: 80301, 80304, 80305.
What is the elevation of Boulder?
5,430 feet (1,655 m) above sea level.
What towns are near Boulder?
Valmont (2.5 mi), Pine Brook Hill (3.1 mi), Seven Hills (4.3 mi), Paragon Estates (4.6 mi), Gunbarrel (5.0 mi).
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