The largest townships in Iowa by population are Des Moines, Cedar Rapids, Davenport, Sioux City and Iowa City. Others include Waterloo, Council Bluffs, Ames and West Des Moines. These are the top nine largest townships in Iowa, and each township has a population of over 61,000, according to the 2013 U.S. Census estimates.
Des Moines had an estimated population of 207,510 in 2013. With a land area of 75.8 square miles, the township's population density is 2,738 people for every square mile. Its population change from the reported results of the 2000 U.S. Census estimate showed a 4.5 percent increase. Des Moines is the state capital.
Cedar Rapids is the second most populous city in Iowa with a population of 128,429. Cedar Rapids has a total land area of 63.1 square miles and a population density of 2,034 people per square mile. Census estimates show Cedar Rapids with a population of 120,758 people, reflecting a growth of 6.4 percent from previous census numbers.
Davenport comes in third with a total population of 102,157, according to census estimates. The city lies on the border of Iowa and Illinois and has a land area of 62.8 square miles. Its population density is 1,627 people per square mile. Davenport experienced an estimated growth of 3.86 percent since 2000.