Sean O'Brien

Sportspeople

• Seán O'Brien, Gaelic footballer for Nemo Rangers
• Seán O'Brien , Irish hurler
• Seán O'Brien, Irish hurler
• Sean O'Brien , American former ice hockey left winger
• Seán O'Brien, former Irish rugby union international flanker for Leinster and London Irish
• Seán O'Brien, former Irish rugby union flanker for Connacht
• Seán O'Brien, Irish rugby union centre / winger for Munster
• Seán O'Brien, American-born Irish rugby union flanker for Connacht
• Sean O'Brien , Australian windsurfer
• Sean O'Brien, English footballer

  Other people

• Sean O'Brien , British writer
• Sean C. O'Brien, co-discoverer of buckminsterfullerene
• Sean O'Brien, American trade unionist
• Sean O'Brien, bassist and original member of Boston rock band Come
• Sean O'Brien , Democratic member of the Ohio Senate