Dallas County

Dallas County is a county located in the U.S. state of Iowa. As of the 2010 census, the population was 66,135. Its county seat is Adel. The county was named for George M. Dallas, Vice President of the United States of America under James K. Polk.Dallas County is included in the Des Moines–West Des Moines, IA Metropolitan Statistical Area.HistoryThe land that now forms Dallas County was ceded by the Sac and Fox nation to the United States in a treaty signed on October 11, 1842, and the county was formed in 1846. In 1847 the first pioneers selected a site for the county seat, which was first called Penoach and then later Adel. Once the prairie sod was "broken" by the agricultural plow, settlement was rapid in the 1850s and 1860s, with the population crossing the 12,000 mark by 1870.