The 2017–18 Regional Super50 was the 44th edition of the Regional Super50, the domestic limited-overs cricket competition for the countries of the West Indies Cricket Board (WICB). The tournament started on 31 January 2018 and finished on 24 February 2018. Barbados were the defending champions. The Windward Islands won the tournament, beating the defending champions Barbados by three wickets in the final.