Faulk, county (1,005 sq mi/2,603 sq km; 1990 pop. 2,744), N central S.Dak.; Faulkton; 45°04'N 99°09'W. Agr. area watered by intermittent streams, branches at James R.; wheat, other grains; livestock. L. Faulkton Reservoir and State Lakeside Use Area to S. Formed 1873.
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