Thomas O'Sullivan was an Australian politician.
Thomas or Tom(my) O'Sullivan may also refer to:
Sportspeople Tom O'Sullivan (Dingle Gaelic footballer) (born 1996), Kerry Gaelic footballer Tom O'Sullivan (Rathmore Gaelic footballer) (born 1978), Kerry Gaelic footballer Tom O'Sullivan (hurler), Irish hurler Tommy O'Sullivan (born 1995), Welsh footballer
Other Tom O'Sullivan (actor), Australian television, film and theatre actor Thomas C. O'Sullivan (1858–1913), American politician Tomás Rua Ó Súilleabháin (1785–1848), Irish poet
See also Thomas Sullivan (disambiguation)