Map of Boulder, United States

Boulder is a city in Colorado, United States, with a population of about 106,803. It lies at 40.0150°N, 105.2706°W, about 1624 m above sea level. Boulder is about 2,417 km (1,502 mi) west of Washington, D.C., the capital. The nearest city on our map is Broomfield, 19 km to the southeast.

Boulder at a glance

Where is Boulder?

• The 12th largest city in Colorado on this site.
• Located in the Northern and Western hemispheres.
• Daylight ranges from about 9 h 19 min on the shortest day to 15 h 01 min on the longest day (around 21 December and 21 June).

Cities near Boulder

• Broomfield — 19 km southeast
• Longmont — 22 km northeast
• Westminster — 28 km southeast
• Northglenn — 28 km southeast
• Arvada — 28 km southeast
• Thornton — 30 km southeast
• Commerce City — 37 km southeast
• Lakewood — 38 km southeast
• Brighton — 38 km east
• Denver — 39 km southeast

Largest cities in Colorado

• Denver — 729,019
• Colorado Springs — 456,568
• Aurora — 359,407
• Fort Collins — 170,924
• Lakewood — 152,597
• Thornton — 133,451
• Westminster — 116,317
• Arvada — 115,368
• Centennial — 109,741
• Pueblo — 109,412

Largest cities in United States

• New York City — 8,804,190
• Los Angeles — 3,820,914
• Brooklyn — 2,736,074
• Chicago — 2,664,452
• Queens — 2,316,841
• Houston — 2,314,157
• Phoenix — 1,650,070
• Philadelphia — 1,573,916
• San Antonio — 1,526,656
• Manhattan — 1,487,536

Map of United States and all its cities →

Sources: place names, coordinates, populations and time zones from GeoNames (CC BY 4.0, data retrieved October 2026). Population figures are the latest values recorded in GeoNames; depending on the country they refer to the city proper, a municipality or a wider urban area, so they can differ from census or metro-area figures. Map © OpenStreetMap contributors.