Christopher O'Sullivan (born 2 June 1982) is an Irish Fianna Fáil politician who has been a Teachta Dála (TD) for the Cork South-West constituency since the 2020 general election.

[3] His father, Christy O'Sullivan, served as a Fianna Fáil TD from 2007 to 2011.

[3] Deirdre Kelly was co-opted to O'Sullivan's seat on Cork County Council following his election to the Dáil.

O'Sullivan was previously in a relationship with fellow Cork TD Holly Cairns of Social Democrats.

However, the relationship ended in 2020; Cairns cited pressure from social media for Cairns and O'Sullivan to answer for each other's political decisions as having negatively impacted upon them.