WI is the postal abbreviation for the U.S. state Wisconsin, which was granted entrance into the Union as the 30th state on May 29, 1848; Wis. is the non-postal abbreviation for Wisconsin. Wisconsin became a U.S. territory soon after the American Revolution. It was a promising home for settlers who were seeking employment in the dairy industry, mining and lumber.
Wisconsin produces more quality dairy products than any other state. It is also home to famous people in history, such as U.S. Army General Douglas MacArthur, magician Harry Houdini and architect Frank Lloyd Wright. It is nicknamed the "Badger State," has a total area of 65,496 miles and Madison is the capital.