South Works is an area in the South Chicago part of Chicago, Illinois, near the mouth of the Calumet River, that was previously home to a now-closed and vacant US Steel manufacturing plant. The area is called "South Works" because that was the name of the now-shuttered steel plant. The use of the word "works," following a common name of the area in which the plant was located, was how US Steel named its plants back then. For example, the US Steel plant at Gary, Indiana, is known as "Gary Works."