Thomas P. "Tommy" Byrnes (February 19, 1923 in Teaneck, New Jersey – January 9, 1981) was an American basketball player.
He played collegiately for the Seton Hall University.
He played for the New York Knicks (1946–49), Indianapolis Jets (1949), Baltimore Bullets (1949–50), Washington Capitols and Tri-Cities Blackhawks (1950–51) in the BAA and NBA for 265 games.
