 D'Arcy first held political office in December 2003, when he was co-opted as a Wexford County Councillor for the Gorey area, to replace his father Michael who had been forced to stand down when the Local Government Act 2001 abolished the dual mandate.He was re-elected at the 2004 local elections where he topped the poll.During his time on Wexford County Council, D'Arcy held the position of the council's Vice-Chairman.