Keith "Keef" Hartley (8 April 1944 – 26 November 2011) was an English drummer and bandleader. He fronted his own eponymous band, known as the Keef Hartley Band or the Keef Hartley Big Band, and played at Woodstock. He was later a member of Dog Soldier, and variously worked with Rory Storm, The Artwoods and John Mayall.
They released five albums, including Halfbreed and The Battle of North West Six (characterised by a reviewer for the Vancouver Sun as "an amazing display of virtuosity"). After that Hartley released a 'solo' album (Lancashire Hustler, 1973) and then he formed Dog Soldier with Miller Anderson (guitar), Paul Bliss (bass), Derek Griffiths (guitar) and Mel Simpson (keyboards). They released an eponymous album in 1975, which had a remastered release in early 2011 on CD on the Esoteric label.
In 2007, Hartley released a ghostwritten autobiography, Halfbreed (A Rock and Roll Journey That Happened Against All the Odds). Hartley wrote about his life growing up in Preston, and his career as a drummer and bandleader, including the Keef Hartley Band's appearance at Woodstock.