Thomas Hitchcock Jr. (February 11, 1900 – April 18, 1944) was an American polo player and aviator who was killed in an air crash during World War II.

Hitchcock played in his first tournament at age 13 and was part of the Meadowbrook Polo Club team that won the 1916 U.S. national junior championship.

After being elected president of the Sixth Form, Hitchcock chose to leave school and join the Lafayette Flying Corps in France during World War I.

Playing with notable stars such as Pete Bostwick, Jock Whitney and Gerald Balding, he led teams to U.S. National Open Championships in 1923, 1927, 1935 and 1936.

In that capacity, he was instrumental in the development of the P-51 Mustang fighter plane, particularly in replacing the original Allison engine with the Packard-built Rolls-Royce Merlin.