Grant County, Wisconsin

Grant County
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
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)
• 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.

^ Cite error: The named reference 2020-census-55043 was invoked but never defined (see the help page).
^ "State & County QuickFacts". United States Census Bureau. Archived from the original on June 6, 2011. Retrieved January 18, 2014.
^ "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.
^ "Grant County Place Names". Grant County Historical Society. Retrieved June 3, 2022.