Thomas O'Malley

Thomas O'Malley may refer to:

• Thomas Francis O'Malley (1889-1954), American politician
• Thomas O'Malley (congressman) (1903–1979), U.S. representative from Wisconsin
• Thomas J. O'Malley (1868–1936), American politician, lieutenant governor of Wisconsin
• Thomas O'Malley (writer), Irish writer
• Thomas P. O'Malley (1930–2009), American Jesuit and academic
• Thomas D. O'Malley Jr. (1933–1998), American politician, treasurer of Florida
• Tom O'Malley (born 1960), former American Major League Baseball player
• Tom O'Malley (American football) (1925–2011), American football player
• T. J. O'Malley (1915–2009), American aerospace engineer
• Thomas O'Malley, the alley cat in the film The Aristocats