1848    Wisconsin is admitted as the 30th U.S. state.

1882    The world's first commercial hydroelectric power plant (later known as Appleton Edison Light Company) begins operation on the Fox River in Appleton, Wisconsin, United States.

1903    The first race at The Milwaukee Mile in West Allis, Wisconsin is held. It is the oldest major speedway in the world.

1914    A male servant of American architect Frank Lloyd Wright sets fire to the living quarters of the architect's Wisconsin home, Taliesin, murders seven people and burns the living quarters to the ground.

2005    Terry Ratzmann shoots and kills six members of the Living Church of God and the minister at Sheraton Inn in Brookfield, Wisconsin before killing himself.