Buddy Stewart (born Albert James Byrne Jr.; September 22, 1922 – February 1, 1950) was an American jazz singer.

Stewart remained with Krupa through 1946, often singing alongside Anita O'Day and Carolyn Grey.

He began recording as a solo act in 1948, as a co-leader with Kai Winding, and in 1949 with the Charlie Barnet orchestra.

[6] To assist Stewart's widow, a benefit concert was performed at the Birdland Jazz Club in New York City.

Performers included Ella Fitzgerald, Charlie Ventura, Stan Getz, Tony Scott, Al Cohn, Lester Young, Lennie Tristano, Harry Belafonte, J. J. Johnson, Charlie Parker, John Coltrane, and Dizzy Gillespie.