William H. Thomas
William H. Thomas may refer to:

 William Hannibal Thomas (1843–1935), American teacher, journalist, judge, writer and legislator
 William H. Thomas (Wisconsin politician) (1821–1898), American politician
 William Henry Thomas (1920–2009), American politician
 William Holland Thomas (1805–1893), American Confederate army officer 
 William H. Thomas (Medal of Honor) (1923–1945), American soldier
 William H. Thomas (physician) (born 1959), American physician
 William H. Thomas (Alabama judge) (1867–1945), associate justice of the Alabama Supreme Court
 William H. Thomas (Maryland judge) (c. 1861–1924), judge of the Maryland Court of Appeals

See also
 William Howell Arthur Thomas (1895–1979), Canadian MP
 William Huw-Thomas (), Welsh actor
 William Thomas (disambiguation)