Boulder Population 2026
Boulder has a population of 106,803, making it the #297 biggest city in 🇺🇸 United States, located in Colorado. It is about 82× smaller than New York City, the country's biggest city.
Population (city proper)
106,803
Rank in United States
#297
Coordinates
40.01°N, 105.27°W
~1,624 m elevation · America/Denver
Distance to capital (Washington)
2,417 km
1,501 miles, straight line
Other big cities in Colorado
| City | Population | Rank in United States |
|---|---|---|
| Denver | 729,019 | #19 |
| Colorado Springs | 456,568 | #43 |
| Aurora | 359,407 | #54 |
| Fort Collins | 170,924 | #156 |
| Lakewood | 152,597 | #180 |
| Thornton | 133,451 | #210 |
| Westminster | 116,317 | #253 |
| Arvada | 115,368 | #256 |
Cities near Boulder
- Louisville20,396 people · ~13 km away
- Lafayette27,729 people · ~16 km away
- Broomfield65,065 people · ~19 km away
- Erie21,420 people · ~19 km away
- Longmont92,088 people · ~22 km away
- Westminster116,317 people · ~28 km away
FAQ
What is the population of Boulder?
Boulder has a population of 106,803 (city proper, latest official figure via GeoNames), making it the #297 biggest city in United States.
What state is Boulder in?
Boulder is located in Colorado, United States.
Is Boulder the capital of United States?
No, the capital of United States is Washington D.C., about 2,417 km away.
Sources & notes
Population refers to the city proper (municipal boundaries), not the metropolitan area. Source: GeoNames (CC BY 4.0), retrieved 2026-07-07. Country data: UN World Population Prospects 2024.
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