Reddish is an area of the Metropolitan Borough of Stockport, in Greater Manchester, England. It is north of Stockport and southeast of Manchester. The population is 30,055 in an area of 7.08 square kilometres (2.73 mi²). By the UK Census 2011 the population of both wards (north and south) decreased to a combined total of 28,052. Historically a part of Lancashire, Reddish grew and developed rapidly during the Industrial Revolution and still retains landmarks from that period, such as Houldsworth Mill, a former textile mill.