'Jefferson County, MS' definitions:
Jefferson -- U.S. County in Mississippi
From: Gazetteer 2000
Name :
Jefferson -- U.S. County in Mississippi
Population (2000) :
9740
Housing Units (2000) :
3819
Land area (2000) :
519.387161 sq. miles (1345.206514 sq. km)
Water area (2000) :
7.805469 sq. miles (20.216072 sq. km)
Total area (2000) :
527.192630 sq. miles (1365.422586 sq. km)
Located within :
Mississippi (MS), FIPS 28
Location :
31.739326 N, 91.046970 W