Timothy Sullivan ("Big Tim" Sullivan) (1862–1913) was a New York politician who controlled Manhattan's Bowery and Lower East Side districts. Tim or Timothy Sullivan may also refer to:

Arts and literature

* Tim Sullivan (writer) (1948–2024), American science fiction author * Timothy Sullivan (composer) (born 1954), Canadian composer * Tim Sullivan (British filmmaker) (born 1958), British film director and screenwriter * Tim Sullivan (director) (born 1964), American film director and screenwriter

Sports

* Ted Sullivan (baseball) (Timothy Sullivan, 1851–1929), Irish baseball player and manager * Tim Sullivan (athlete) (born 1975), Australian Paralympic track and field athlete * Tim Sullivan (sports columnist), American sports journalist

Other

* Timothy Daniel Sullivan (1827–1914), Irish politician and poet * Timothy Sullivan (Medal of Honor) (1835–1910), American Civil War sailor * Timothy Sullivan (Irish judge) (1874–1949), Chief Justice of Ireland * Timothy J. Sullivan (born 1944), American academic, President of the College of William and Mary * Timothy S. Sullivan (fl. 1970s–2010s), United States Coast Guard rear admiral {{hndis, Sullivan, Timothy