John Cowan (born August 24, 1952 in Evansville, Indiana) is an American soul music and progressive bluegrass vocalist and bass guitar player. He was the lead vocalist and bass player for the New Grass Revival. Cowan was bassist in the band in 1972 from original bassist Ebo Walker, and was noted as being the only member of New Grass Revival not to come from a bluegrass background.
After the breakup of the New Grass Revival, Cowan released a soul record of covers, called "Soul'd Out", on the Sugar Hill Records label in 1990.
Cowan appeared as a duo with Sam Bush on the PBS series, Lonesome Pine Special in 1992, and also appeared with other artists on the program.
From 1988 to 1996 Cowan teamed with Rusty Young of Poco, Bill Lloyd of Foster & Lloyd and Pat Simmons of the Doobie Brothers in a band originally called Four Wheel Drive which was later changed to The Sky Kings. Several singles were released but failed to chart well. Two albums were recorded but not released by RCA until 1997 after the group's demise as the Sky Kings, "Out of the Blue".