Codnor is a village and civil parish in the Amber Valley district of Derbyshire, England. Codnor is a former mining village and had a population of 3,766 taken at the 2011 Census. It is approximately 12 miles from Derby and 14 miles from Nottingham. Codnor forms a built up area with nearby Ripley.

Amber Valley is a local government district with borough status in the east of Derbyshire, England, taking its name from the River Amber. Its council is based in Ripley. The district covers a semi-rural area lying to the north of the city of Derby. The district contains four main towns whose economy was based on coal mining and remains to some extent influenced by engineering, distribution and manufacturing, holding for instance the headquarters and production site of Thorntons confectionery.