Blackdown is a hamlet and civil parish in the Warwick district of Warwickshire, England. Blackdown is about two miles north of Leamington Spa, between Leamington, Warwick and Kenilworth. It is named Blakedon in William Dudgale's Antiquities of Warwickshire in 1656 as a district within the parish of Lillington, and as having a mill on the River Avon. Blackdown Mill on Wooton Road is Grade II listed. According to the 2001 Census it had a population of 128.