Cedar Rapids is a city in Linn County, Iowa, United States, and its county seat. The population was 137,710 at the 2020 census, making it the second-most populous city in Iowa. The city lies on both banks of the Cedar River, 20 miles (32 km) north of Iowa City and 128 miles (206 km) northeast of Des Moines, the state's capital. Cedar Rapids is the economic hub of Eastern Iowa, located at the core of the Interstate 380 corridor. The population of the three-county Cedar Rapids metropolitan area, which includes the nearby cities of Marion and Hiawatha, was 276,520 in 2020. The Cedar Rapids metropolitan area is also part of a combined statistical area with the Iowa City metropolitan area.