Paul Vincent Costello (* December 27, 1894 in Philadelphia, Pennsylvania, † April 17, 1986 ) was an American rower. With three victories at the Olympic games, he is one of the most successful rowers in the first half of the 20th century.
Although Costello won national championships in 1919 and 1922 in One, but he was far more successful with the double sculls. Together with his cousin John B. Kelly, the father of Grace Kelly and John B. Kelly Jr., he won at the Olympic Summer Games 1920, the gold medal. They repeated this success four years later in Paris.
After Kelly had ended his sports career was Charles McIlvaine Costello's new rowing partner. At the Summer Olympics in Amsterdam in 1928 succeeded Costello again to win the race. He was thus the first rowers at all the in a row in the same discipline Olympic champion three times. Next to him, this was achieved only Vyacheslav Ivanov and Pertti Karppinen in One, and Steven Redgrave in the coxless pairs.