Grant County, Wisconsin

Grant County
Grant County Courthouse, Armand D. Koch, architect, 1902
Map of Wisconsin highlighting Grant County
Location within the U.S. state of Wisconsin
Map of the United States highlighting 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
Founded1837
SeatLancaster
Largest cityPlatteville
Area
 • Total1,183 sq mi (3,060 km2)
 • Land1,147 sq mi (2,970 km2)
 • Water36 sq mi (90 km2)  3.1%
Population
 • Total51,938
 • Estimate 
(2023)
51,409 Decrease
 • Density45.3/sq mi (17.5/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional district3rd
Websitewww.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.

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