Keystone is located in South Dakota. Keystone, South Dakota has a population of 469. Keystone is more family-centric than the surrounding county with 50.98% of the households containing married families with children. The county average for households married with children is 27.5%.
The median household income in Keystone, South Dakota is $53,194. The median household income for the surrounding county is $62,546 compared to the national median of $69,021. The median age of people living in Keystone is 36.8 years.
The average high temperature in July is 81.2 degrees, with an average low temperature in January of 12.1 degrees. The average rainfall is approximately 20.1 inches per year, with 54.1 inches of snow per year.
