Mark Lockheart (born Lymington, 1961) is a British jazz tenor saxophonist who came to prominence as a member of the Loose Tubes big band during the 1980s. He has also played in sessions with Radiohead, Prefab Sprout, Stereolab and many others. Lockheart currently teaches at Trinity College of Music in London and is a tutor for the National Youth Jazz Collective. He also plays in British jazz quintet Polar Bear.