Castle Rock is a city located in Colorado. With a 2020 population of 70,687, it is the 16th largest city in Colorado and the 525th largest city in the United States. Castle Rock is currently growing at a rate of 4.32% annually and its population has increased by 46.56% since the most recent census, which recorded a population of 48,231 in 2010. Spanning over 34 miles, Castle Rock has a population density of 2,061 people per square mile.
The average household income in Castle Rock is $122,417 with a poverty rate of 4.34%. The median rental costs in recent years comes to $1,460 per month, and the median house value is $391,100. The median age in Castle Rock is 35.2 years, 34.3 years for males, and 36 years for females. For every 100 females there are 99.3 males.