The Rust Belt, formerly the Steel Belt or Factory Belt, is an area of the United States that underwent substantial industrial decline in the late 20th century. The region is centered in the Great Lakes and Mid Atlantic regions of the United States. Common definitions of the Rust Belt include Illinois, Indiana, Iowa, Michigan, Minnesota, New Jersey, New York, Ohio, Pennsylvania, and Wisconsin. The term "Rust Belt" is considered to be a pejorative by some people in the region.