Mack Magaha (August 1, 1929 – August 15, 2003) was an American bluegrass fiddler best known as a member of Porter Wagoner's band, and a long-time backup player in the pioneering bluegrass band, Reno and Smiley.
In 1955, Magaha joined Reno and Smiley as a member of the Tennessee Cutups. Together with Don Reno he wrote the popular song "I know You're Married But I Love You Still" which was recorded by Reno & Smiley. It was later covered by artists such as Bill Anderson, Rodney Crowell, Jan Howard, Patty Loveless, Jimmy Martin, Red Sovine, and Travis Tritt. In 1964, he joined Porter Wagoner's Wagonmasters. During the 1960s, he worked as an old-time fiddler on The Porter Wagoner Show and later worked with the aspiring female star on the show, Dolly Parton. Among the later songs Magaha wrote, "We'll Get Ahead Someday" provided a top-ten country single for Wagoner and Parton in 1968, one of their first duet hits.