Castle Rock is a city located in Colorado. With a 2020 population of 75,452, it is the 15th largest city in Colorado and the 481st largest city in the United States. Castle Rock is currently growing at a rate of 4.84% annually and its population has increased by 56.44% since the most recent census, which recorded a population of 48,231 in 2010. Castle Rock reached it's highest population of 75,452 in 2021. Spanning over 34 miles, Castle Rock has a population density of 2,200 people per square mile.
The average household income in Castle Rock is $127,791 with a poverty rate of 3.89%. The median rental costs in recent years comes to $1,536 per month, and the median house value is $422,100. The median age in Castle Rock is 35.8 years, 35 years for males, and 36.6 years for females. For every 100 females there are 98.3 males.