Kilroy is a surname. Notable people with the surname include:
Alix Kilroy (1903–1999), one of the first two women to have entered the administrative grade of the British Civil Service by examination
Bucko Kilroy (1921–2007), American football player and executive with the New England Patriots
Howard Kilroy
James Kilroy (politician) (1890–1954), Irish Fianna Fáil politician
James J. Kilroy (1902-1962), assumed to be the origin of the "Kilroy was here" expression
Joe Kilroy (born 1960), Australian rugby league player
Mark Kilroy (born 1968), University of Texas at Austin student was killed in a human sacrifice ritual in Mexico.
Mary Jo Kilroy (born 1949), American politician and U.S. Congresswoman from Ohio
Matt Kilroy (1866–1940), American baseball player
Matthew Kilroy, British Army murderer involved in the Boston Massacre
Michael Kilroy, Irish politician and coach builder
Mike Kilroy (1869–1960), former American Major League Baseball pitcher
Shawn Kilroy (born 1964), retired Canadian ice hockey goaltender
Thomas Kilroy (born 1934), Irish playwright and novelist
