. "33309"^^ . "2010Z"^^ . "4.14398e+07"^^ . . . . "Marion County is a county located in the U.S. state of Iowa. As of the 2010 census, the population was 33,309. The county seat is Knoxville. It is named for Francis Marion, a brigadier general from South Carolina in the American Revolutionary War."@en . "1.43744e+09"^^ . "1.47888e+09"^^ . . "2.8"^^ . . . "23.1661"^^ . . "Marion County"@en .