Castle Rock is located in South Dakota. Castle Rock, South Dakota has a population of 295.
The median household income in Castle Rock, South Dakota is $46,563. The median household income for the surrounding county is $48,941 compared to the national median of $69,021. The median age of people living in Castle Rock is 43.1 years.
The average high temperature in July is 87.3 degrees, with an average low temperature in January of 9.7 degrees. The average rainfall is approximately 16.7 inches per year, with 38 inches of snow per year.