Keystone is located in Iowa. Keystone, Iowa has a population of 554. Keystone is less family-centric than the surrounding county with 25% households with children. The county percentage for households with children is 29%.
The median household income in Keystone, Iowa is $66,339. The median household income for the surrounding county is $69,218 compared to the national median of $66,222. The median age of people living in Keystone is 44.8 years.
The average high temperature in July is 84.58 degrees, with an average low temperature in January of 8.22 degrees. The annual precipitation is 35.06.