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Des Moines County is part of the Burlington, IAâIL Micropolitan Statistical Area. Des Moines County should not be confused with the city of Des Moines, which is the capital of Iowa. Des Moines County sits on Iowa's eastern border alongside the Mississippi River. The city of Des Moines is in Polk County in south-central Iowa. Both places derive their name from the Des Moines River, which flows through both the city and the county.
Des Moines County is a county located in the U.S. state of Iowa. As of the 2010 census, the population was 40,325. The county seat is Burlington. It is one of Iowa's two original counties along with Dubuque County; both were organized by the Michigan Territorial legislature in 1834.