Castle Rock is a city located in Washington. With a 2020 population of 2,327, it is the 159th largest city in Washington and the 7070th largest city in the United States. Castle Rock is currently growing at a rate of 1.22% annually and its population has increased by 17.41% since the most recent census, which recorded a population of 1,982 in 2010. Spanning over 2 miles, Castle Rock has a population density of 1,117 people per square mile.
The average household income in Castle Rock is $56,191 with a poverty rate of 17.62%. The median rental costs in recent years comes to $732 per month, and the median house value is $158,400. The median age in Castle Rock is 33.6 years, 34.1 years for males, and 33.2 years for females. For every 100 females there are 91.2 males.