Three Castles (disambiguation)

Three Castles was a medieval lordship in Monmouthshire, Wales, comprising the fortifications of Grosmont, Skenfrith and White Castle.

Three Castles or Threecastles may also refer to:
 * Three Castles of Bellinzona, Ticino, Switzerland (namely Castelgrande, Montebello and Sasso Corbaro)
 * Three castles of Husseren-les-Châteaux or Eguisheim, Haut-Rhin, Vosges, France (namely the Dagsburg, the Wahlenburg and Weckmund Castle)
 * Three castles at Dahn, Rhineland-Palatinate, Germany (namely Altdahn, Grafendahn, Tanstein)
 * Threecastles Castle, Blessington, County Wicklow, Ireland.
 * Threecastles, County Kilkenny, village in Ireland
 * Three Castles Walk (disambiguation), various long-distance footpaths in Britain