Keith McCormack (born October 19, 1940, Dalhart, Texas) is an American singer, guitarist and songwriter.
McCormack sang and played guitar for the Patio Kids, the Rock 'n' Rollers, the Leen Teens and, finally, the String-A-Longs with Aubrey deCordova and Richard Stephens from 1956 until 1965. The Leen Teens were managed by Norman Petty, who later renamed them the String-A-Longs, and in 1960 they had their biggest hit with "Wheels", which reached number 2.
McCormack co-wrote "Sugar Shack" with his aunt Fay Voss, which was recorded by Jimmy Gilmer and the Fireballs and sold over one milling copies in the United States in 1963. It was the biggest selling song of the year and spent five weeks at number 1 on the Billboard Hot 100 from October 12 until November 9, 1963.