Conor O'Callaghan (born 1968) is an Irish novelist and poet.
His first novel, Nothing on Earth, was published to acclaim in 2016 and was shortlisted for the Kerry Group Irish Novel of the Year.
His memoir Red Mist: Roy Keane and the Football Civil War (2004) is an account of Roy Keane's departure from the Republic of Ireland's 2002 World Cup squad.
O'Callaghan is a former co-holder of the Heimbold Chair of Irish Studies at Villanova University.
He lives in Sheffield with his wife, Mary Peace, a scholar of eighteenth-century literature.