Thomas O'Halloran

Thomas or Tom O'Halloran may refer to:


 * Tom O'Halloran (footballer) (1892–1970), Australian rules (VFL) footballer with South Melbourne
 * Tom O'Halloran (climber) (born 1992), Australian climber
 * Tom O'Halloran (musician), Australian musician
 * Thomas O'Halloran (footballer) (1904–1956) Australian rules (VFL) footballer playing for Richmond
 * Thomas A. O'Halloran (1931–2015), American particle physicist
 * Thomas Shuldham O'Halloran (1797–1870), South Australian police commissioner
 * T. J. S. O'Halloran (1835–1922), his son, magistrate and minor football identity
 * Thomas Shuldham O'Halloran (lawyer) (1865–1945), his grandson, SAFL football official