Rear Admiral Warner Baldwin Bayley (9 September 1845 – 22 April 1928) was a United States Navy officer.

[1][2] After another tour at the Bureau of Steam Engineering from 1880 to 1881, Bayley was on special duty with the United States Department of the Navy from 1881 to 1885.

He remained there until he reported aboard the battleship USS Massachusetts in the North Atlantic Squadron for duty as Fleet Engineer.

[1] After the U.S. Navy abolished the distinction between engineering and line officers, Bayley's rank was converted to lieutenant commander on 3 March 1899.

[1][2][3] From September to November 1903, Bayley was a member of a board of inquiry examining the 15 February 1898 destruction of the battleship USS Maine in Havana harbor, which precipitated the outbreak of the Spanish–American War.