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

See also[edit]

• Tom O'Halleran (born 1946), American politician