Keith Douglas "Midge" Marsden MNZM (born 1945) is a New Zealand blues and R&B guitarist, harmonica-player, and singer with a musical career spanning four decades.
He was voted New Zealand Entertainer of the Year in 1990, and his 1991 album Burning Rain later went gold.
Musicians on that tour included, Neil Hannan on bass, Martin Winch on guitar, Paul Dunningham on drums, Brian Henderson on keyboards, George Chisolm and Geoff Culverwell on trumpets and Brian Smith and Steve Sheriff on saxophones.
Marsden was a student at the University of Mississippi in 1996, from where he graduated with a Diploma in Southern Studies, and more recently he has tutored at Waikato Institute of Technology in "Bluesology".
In the 2006 New Year Honours, Marsden was appointed a Member of the New Zealand Order of Merit, for services to music.