Cedar Rapids is a city in and the county seat of Linn County, Iowa, United States. The city lies on both banks of the Cedar River, 20 miles north of Iowa City and 128 miles northeast of Des Moines, the state's capital. The population was 137,710 at the 2020 census, making it the second-most populous city in Iowa. The population of the three-county Cedar Rapids metropolitan area, which includes the nearby cities of Marion and Hiawatha, was 276,520 in 2020.