Ullerwood Castle is an early medieval castle, possibly a shell keep, in Ringway, Greater Manchester, England (grid reference SJ8083). The castle is first referred to in 1173, in a document stating Hamo de Masci held the castles of Ullerwood and Dunham. There is no other contemporary documented reference to the castle. Ullerwood Castle has been confused with Watch Hill Castle in nearby Bowdon, but the two are separate castles, though both probably owned by de Masci. The site is underneath a house and surrounded by trees.