Students find the following Wisconsin state facts in this printble: Wisconsin state abbreviation: WI. Wisconsin state census region: East North Central. Wisconsin state area (sq miles): 65,496. Wisconsin state capital: Madison. Wisconsin state population: 5,686,986. Wisconsin state motto: Forward. Wisconsin state song: State song: "On, Wisconsin!". Wisconsin state bird: American robin. Wisconsin state flower: Violet. Wisconsin state tree: Sugar Maple. Wisconsin state insect: Sheridan's green hairstreak. Wisconsin state mammal: Badger (1957) - land mammal.