Robert Lee McCollum (November 30, 1909 – November 5, 1967) was an American blues musician who played and recorded under the pseudonyms Robert Lee McCoy and Robert Nighthawk. He was the father of the blues musician Sam Carr. Nighthawk was inducted into the Blues Hall of Fame in 1983.

McCollum was born in Helena, Arkansas on November 30, 1909. He left home at an early age and became a busking musician. After a period traveling through southern Mississippi, he settled for a time in Memphis, Tennessee, where he played with local orchestras and musicians, such as the Memphis Jug Band. A particular influence during this period was Houston Stackhouse, from whom he learned to play slide guitar and with whom he performed on the radio in Jackson, Mississippi.