U S Navy Flag (foaled 6 February 2015) is an American-bred, Irish-trained Thoroughbred racehorse. In 2017 he became the first horse in 35 years to win both the Middle Park Stakes and the Dewhurst Stakes. As two-year-old he was beaten in his first four racecourse appearances, including the Coventry Stakes before winning a maiden race in July. He then finished second in the July Stakes and fourth in the Phoenix Stakes before recording his first significant win in the Group 3 Round Tower Stakes. He won the Middle Park Stakes at Newmarket Racecourse on 30 September and returned to the same track two weeks later to follow up in the Dewhurst Stakes. As a three-year-old in 2018 he ran in several major mile races without success before dropping back to sprint distances to win the July Cup.