The Cathedral Church of St Edan is a cathedral of the Church of Ireland in Ferns, County Wexford in Ireland. It is in the ecclesiastical province of Dublin. Until 1949, the designation of the cathedral was the Cathedral Church of St. Ædan, a variant spelling of Edan or Aidan.

Ferns is a historic town in north County Wexford, Ireland. It is 11 km (7 mi) north of Enniscorthy. The remains of Ferns Castle are in the centre of the town.