surigao del norte (surigaonon: "probinsya nan surigao del norte"; ; spanish: "provincia de surigao del norte") is a province in the philippines located in the caraga region of mindanao. its capital is surigao city. the province comprises two major islands—siargao and bucas grande—in the philippine sea, plus a small area at the northeastern tip of mindanao. this mainland portion borders agusan del norte, and surigao del sur to the south.