Páidí O'Brien (born 13 February 1984 in Cork, Ireland[1]) is a retired Irish professional road racing cyclist.
He rode with amateur teams in Ireland and France, and was selected to ride for the Irish National Team at elite events including the Tour of Britain and Tour de Langkawi.
O'Brien turned professional in 2006 and joined Sean Kelly ACLVB–M.Donnelly in its debut year, winning a second consecutive under-23 national road race title and finishing third in the elite event that season.
He spent five years with the squad and was involved in its first ever professional victory at the 2008 Vuelta a Extremadura, an opening stage team time trial.
He also turned his hand to cyclocross, finishing ninth in the Irish national championship race in 2019 and nineteenth in 2020.