The Rust Belt is the region of the United States from the Great Lakes to the upper Midwest States. Rust refers to the deindustrialization, or economic decline, population loss, and urban decay due to the shrinking of its once-powerful industrial sector. The term gained popularity in the U.S. in the 1980s.
The Rust Belt begins in western New York and traverses west through Pennsylvania, West Virginia, Ohio, Indiana, and the Lower Peninsula of Michigan, ending in northern Illinois, eastern Iowa, and southeastern Wisconsin. Previously known as the industrial heartland of America, industry has been declining in the region since the mid-20th century due to a variety of economic factors, such as the transfer of manufacturing further West, increased automation, and the decline of the US steel and coal industries. While some cities and towns have managed to adapt by shifting focus towards services and high-tech industries, others have not fared as well, witnessing rising poverty and declining populations.
In the 20th century, local economies in these states specialized in large-scale manufacturing of finished medium to heavy industrial and consumer products, as well as the transportation and processing of the raw materials required for heavy industry. The area was referred to as the Manufacturing Belt,Factory Belt, or Steel Belt as distinct from the agricultural Midwestern states forming the so-called Corn Belt and Great Plains states that are often called the "bread-basket of America".