Grant County, Wisconsin

Grant County
County
Grant County Courthouse, Armand D. Koch, architect, 1902
Location within the U.S. state of Wisconsin
Wisconsin's location within the U.S.
Coordinates: 42°52′N 90°43′W / 42.86°N 90.71°W / 42.86; -90.71
Country	United States
State	Wisconsin
Founded	1837
Seat	Lancaster
Largest city	Platteville
Area
• Total	1,183 sq mi (3,060 km2)
• Land	1,147 sq mi (2,970 km2)
• Water	36 sq mi (90 km2)  3.1%
Population  (2020)[1]
• Total	51,938
• Estimate  (2023)	51,409
• Density	45.3/sq mi (17.5/km2)
Time zone	UTC−6 (Central)
• Summer (DST)	UTC−5 (CDT)
Congressional district	3rd
Website	www.co.grant.wi.gov

Grant County is the most southwestern county in the U.S. state of Wisconsin. As of the 2020 census, the population was 51,938.^[2] Its county seat is Lancaster and its largest city is Platteville.^[3] The county is named after the Grant River, in turn named after a fur trader who lived in the area when Wisconsin was a territory.^[4] Grant County comprises the Platteville Micropolitan Statistical Area. It is in the tri-state area of Wisconsin, Illinois, and Iowa, and is crossed by travelers commuting to Madison, Wisconsin, from a number of eastern Iowan cities, and by residents of northern Illinois traveling to the Twin Cities or La Crosse, Wisconsin.