Reddish has been, since 1974, an area of the Metropolitan Borough of Stockport, in Greater Manchester, England. It is 2 miles (3.2 km) north of Stockport and 4.6 miles (7.4 km) southeast of Manchester. The population is 30,055 in an area of 7.08 square kilometres (2.73 mi²).
Reddish was part of Manchester in Lancashire until 1901. The town of Stockport expanded northward and absorbed the civil parish into its urban district. In 1935 Reddish was merged into Stockport parish. At this point the boundary between the counties of Lancashire and Cheshire was formally moved so that Reddish was from that time on in Cheshire.