Mayo, Henry Thomas (1856–1937), a United States naval officer. Mayo was born in Burlington, Vermont. He graduated from the U.S. Naval Academy in 1876. As a rear admiral Mayo became involved in an international incident in 1914, when Mexican officials at Tampico arrested Marines from his fleet. This incident led to the occupation of the port city of Veracruz by United States forces.

Mayo was commander in chief of the Atlantic Fleet, 1916–19, during the entire period of United States participation in World War I. He commanded the combined Atlantic and Pacific fleet in 1919 and retired in 1920. In 1930 Mayo was made a full admiral on the retired list.