McCook is one of the 66 counties in the state of South Dakota. It was created in 1873 from part of Hanson county. As of the 2010 census, the population was 5,618. The county seat is Salem. The county has 577 square miles of area.
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McCook is one of the 66 counties in the state of South Dakota. It was created in 1873 from part of Hanson county. As of the 2010 census, the population was 5,618. The county seat is Salem. The county has 577 square miles of area.