John Howard Mulroy (February 10, 1925 – September 6, 1999) was an American politician most notable for having served as the first county executive of Onondaga County, New York. Mulroy was born to Morris, a dairy farmer, and Elizabeth, a former schoolteacher. His father served as the Marcellus supervisor on the Onondaga County Board of Supervisors from 1937 to 1953, when the senior Mulroy died in office. His achievements in office include: Mulroy was investigated several times for corruption between 1977 and 1982.He was ultimately convicted of misdemeanors and fined.