Keystone is a city in Benton County, Iowa, United States. The population was 599 at the time of the 2020 census. It is part of the Cedar Rapids Metropolitan Statistical Area.
History
Keystone was platted in 1881 when the Chicago, Milwaukee, and St. Paul Railroad was extended to that point.
Geography
Keystone is located at .
According to the United States Census Bureau, the city has a total area of , all land.