Dwight F. Davis, American tennis player and politician, 49th United States Secretary of War (born 1879)

Dwight Filley Davis Sr. was an American tennis player and politician. He is best remembered as the founder of the Davis Cup international tennis competition. He was the Assistant Secretary of War from 1923 to 1925 and Secretary of War from 1925 to 1929.

The secretary of war was a member of the U.S. president's Cabinet, beginning with George Washington's administration. A similar position, called either "Secretary at War" or "Secretary of War", had been appointed to serve the Congress of the Confederation under the Articles of Confederation between 1781 and 1789. Benjamin Lincoln and later Henry Knox held the position. When Washington was inaugurated as the first President under the Constitution, he appointed Knox to continue serving as Secretary of War.