Map of Castle Rock, United States

Castle Rock is a city in Colorado, United States, with a population of about 55,591. It lies at 39.3722°N, 104.8561°W, about 1897 m above sea level. Castle Rock is about 2,391 km (1,485 mi) west of Washington, D.C., the capital. The nearest city on our map is Parker, 18 km to the northeast.

Castle Rock at a glance

Where is Castle Rock?

• The 18th largest city in Colorado on this site.
• Located in the Northern and Western hemispheres.
• Daylight ranges from about 9 h 23 min on the shortest day to 14 h 57 min on the longest day (around 21 December and 21 June).

Cities near Castle Rock

• Parker — 18 km northeast
• Highlands Ranch — 22 km northwest
• Centennial — 23 km north
• Littleton — 30 km northwest
• Aurora — 40 km north
• Lakewood — 42 km northwest
• Denver — 42 km north
• Commerce City — 49 km north
• Arvada — 52 km north
• Westminster — 54 km north

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.