Alderwasley is a village and civil parish in the Amber Valley district of Derbyshire, England. The population of the civil parish as of the 2011 census was 469. Alderwasley Hall is the home to one of the sites of Alderwasley Hall School which is a special school for children and young people with Aspergers and/or Speech and Language Difficulties. It is about six miles north of Belper. The village's name derives from the Old English for "clearing near alluvial land growing with alders".