Roy Lee Johnson (born December 31, 1938) is an American R&B and soul songwriter, singer and guitarist. He is best known for his composition "Mr. Moonlight", which has been covered by many artists, including The Beatles.

He was born in Centralhatchee, Georgia, and began playing guitar as a child. Around 1955, he joined his first band, The Brassettes, who included Robert Ward and who played local dances in and around Hogansville. After the band won a talent contest in Atlanta, they recorded Johnson's song, "Nobody Does Something For Nothing", for the small Stat label. In the late 1950s, Johnson moved to Ohio, joining Ward in the Ohio Untouchables. However, by 1961 he had returned to Atlanta, and began playing in Piano Red's band, the Interns. His song "Mister Moonlight", which he had written in high school, was first recorded by Piano Red, credited as "Dr. Feelgood and the Interns", and released in 1962 as the b-side of "Doctor Feel-Good" on OKeh 4-7144.