Duane David Allen (born April 29, 1943) had formal training in both operatic and quartet singing before becoming a member of The Oak Ridge Boys in 1966. Allen is the lead singer for the quartet and is heard on the majority of their most successful songs. He was inducted in the Texas Gospel Music Hall of Fame. He attended Texas A&M University–Commerce graduating in 1966, there he was a member of Delta Tau Delta International Fraternity.
He is married to Norah Lee Allen. Daughter Jamie is married to musician Paul Martin, and they have several children. Son Dee is also a musician. Duane and Norah live in Hendersonville, Tennessee.