Wisconsin was admitted to the Union on May 29, 1848 as teh 30th State. Land area: 34.8 million acres, Water area: 1.13 million acres. Length: 320 miles, Width: 295 miles, State parks: 60,570 acres, State forests: 471,329 acres. Largest inland lake: Lake Winnegago-30 miles long and 10 miles wide at the widest point. Deepest inland lake: Green Lake-236 ft.