'McCook County, SD' definitions:

McCook -- U.S. County in South Dakota

From: Gazetteer 2000
Name :
McCook -- U.S. County in South Dakota
Population (2000) :
5832
Housing Units (2000) :
2383
Land area (2000) :
574.515451 sq. miles (1487.988123 sq. km)
Water area (2000) :
2.639899 sq. miles (6.837306 sq. km)
Total area (2000) :
577.155350 sq. miles (1494.825429 sq. km)
Located within :
South Dakota (SD), FIPS 46
Location :
43.662682 N, 97.378786 W