Some cities and counties in Iowa include Des Moines in Polk County, Council Bluffs in Pottawattamie County, Cedar Rapids in Linn County and Waterloo in Black Hawk County. Another city is Iowa City in Johnson County. The first two counties created in Iowa were Des Moines County and Dubuque County, both in 1834.
Des Moines is the county seat of Polk County. It is also the capital of Iowa. As of 2010, Polk County was the most populous county in the state, with 430,640 people.
Council Pluffis is the county seat of Pottawattami County. The county was established in 1847. As of 2010, it had 93,158 people on 585 square miles of land.
As of 2010, Linn County has 211,226 people. It is the state's second-most populous county. Its county seat is Cedar Rapids.
Black Hawk County's seat is Waterloo. As of 2015, it is the fourth most populous county with 131,090. The county was named after Black Hawk, a leader of the native people.
Iowa City is the county seat of Johnson County. As of 2010, the county's population was 130,882. It is the fifth most populous county in the state. The county takes its name from Richard Mentor Johnson, a former vice president of the United States.