Map of Thornton, United States

Thornton is a city in Colorado, United States, with a population of about 133,451. It lies at 39.8680°N, 104.9719°W, about 1631 m above sea level. Thornton is about 2,394 km (1,487 mi) west of Washington, D.C., the capital. The nearest city on our map is Northglenn, 2 km to the northwest.

Thornton at a glance

Where is Thornton?

• The 6th largest city in Colorado on this site.
• Located in the Northern and Western hemispheres.
• Daylight ranges from about 9 h 20 min on the shortest day to 15 h 00 min on the longest day (around 21 December and 21 June).

Cities near Thornton

• Northglenn — 2 km northwest
• Westminster — 7 km southwest
• Commerce City — 7 km southeast
• Broomfield — 11 km northwest
• Arvada — 12 km southwest
• Denver — 14 km south
• Brighton — 18 km northeast
• Aurora — 20 km southeast
• Lakewood — 20 km southwest
• Littleton — 29 km south

Largest cities in Colorado

• Denver — 729,019
• Colorado Springs — 456,568
• Aurora — 359,407
• Fort Collins — 170,924
• Lakewood — 152,597
• Westminster — 116,317
• Arvada — 115,368
• Centennial — 109,741
• Pueblo — 109,412
• Greeley — 108,795

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.