an urban district in the Ilkeston parliamentary division of Derbyshire, England, ro m. N.W. of Nottingham,. on the Great Northern and Midland railways. Pop. (1901) 16,249. Large hosiery works employ many of the inhabitants,, and collieries are worked in the parish. The urban district includes Codnor-cum-Loscoe. Shipley Hall, to the south of Heanor, is a mansion built on a hill, amidst fine gardens. The ruin of the ancient moated castle of Codnor stands, overlooking the vale of the Erewash, on land which was once Codnor Park,, and is now the site of large ironworks.