Baby Boy Warren (August 13, 1919 – July 1, 1977) was an American blues singer and guitarist who was a leading figure on the Detroit blues scene in the 1950s.

He was born Robert Henry Warren in Lake Providence, Louisiana, in 1919, and at the age of three months moved with his parents to Memphis, Tennessee. He was interested in music from an early age, and was working occasionally as a musician from around 1931, when he dropped out of school, having learned to play guitar from two of his older brothers. In the 1930s, he worked in W. C. Handy Park, Memphis, with Howling Wolf, Robert Jr. Lockwood and Little Buddy Doyle and he appeared on the radio show King Biscuit Time, broadcast from Helena, Arkansas, with Sonny Boy Williamson around 1941. In 1942, he moved to Detroit, where he worked for General Motors while also performing as a musician.

Warren’s first recording sessions were in 1949 and 1950 in Detroit, with the five resulting singles being released on a number of labels. Tracks recorded at a 1954 session accompanied by Sonny Boy Williamson were released on Joe Von Battle‘s JVB label and by Excello Records. Further sessions the same year resulted in a single on the Blue Lake label, with Boogie Woogie Red on piano and Calvin Frazier on guitar, and a reworking of the Robert Johnson song “Stop Breakin’ Down” for the Drummond label.