Tim or Timothy O'Brien may refer to:

Arts and entertainment

  • Tim O'Brien (record producer), American record producer and music industry executive.
  • Tim O'Brien (author) (born 1946), American novelist
  • Tim O'Brien (illustrator) (born 1964), American artist
  • Tim O'Brien (musician) (born 1954), American country and bluegrass singer
  • Timothy O'Brien (theatre designer) (1929–2022), British theatre designer

Sports

  • Sir Tim O'Brien, 3rd Baronet (1861–1948), Irish-born cricketer
  • Tim O'Brien (footballer) (born 1994), Australian rules footballer
  • Tim O'Brien (rugby union), head coach of St. Mary's Gaels rugby

Other

  • Sir Timothy O'Brien, 1st Baronet (1787–1862), Irish politician and merchant
  • Tim O'Brien (physicist) (born 1963), astrophysicist at the University of Manchester
  • Tim O'Brien (Connecticut politician) (born 1968), legislator in the Connecticut House of Representatives
  • Tim O'Brien (Indiana politician), member of the Indiana House of Representatives
  • Timothy O'Brien (endocrinologist), Irish professor
  • Timothy L. O'Brien (born 1961), American journalist

See also

  • Timothy (given name)
  • O'Brien (disambiguation)