Alfreton is a town and civil parish in the Amber Valley district of Derbyshire, England. The town was formerly a Norman Manor and later an Urban District. The population of the Alfreton parish was 8,799 at the 2021 Census. The villages of Ironville, Riddings, Somercotes and Swanwick were historically part of the Manor and Urban District, and the population including these was 24,476 in 2001.