Keith MacLeod (popularly known as "Mac" MacLeod) (9 July 1941 – 16 November 2020), was an English musician who was a part of the Hertfordshire folk and blues scene from 1959 onwards. He played in St Albans alongside Mick Softley and Maddy Prior and toured with John Renbourn. Influences include Softley, Ramblin' Jack Elliott, Derroll Adams, Jesse Fuller, Big Bill Broonzy, Snooks Eaglin, Reverend Gary Davis and Davey Graham.
MacLeod was an early influence on Donovan, and was the bassist for the original line-up of Hurdy Gurdy which also inspired the Donovan song "The Hurdy Gurdy Man". MacLeod has also worked with Argent. Other bands MacLeod formed of note include Soft Cloud, Loud Earth with Mick Softley and the acoustic-based band Amber.