Arnalda de Caboet (died 1202), was an Andorran feudal ruler. She was suo jure ruling Lady of Caboet (Cabó), Andorra and Sant Joan in Andorra in 1180-1199.[1] She was born to Arnau de Caboet. She married Arnaud I of Castelbon and became the mother of Ermessenda de Castellbò.