Cedar Rapids is the second-most populous city in Iowa, United States and is the county seat of Linn County. The city lies on both banks of the Cedar River, 20 miles north of Iowa City and 100 miles northeast of Des Moines, the state's capital and largest city. It is a part of the Cedar Rapids/Iowa City region of Eastern Iowa, which includes Linn, Benton, Cedar, Iowa, Jones, Johnson, and Washington counties. At the 2020 United States Census, the city population was 137,710.