Davao Oriental is a province in Davao Region.
Davao Oriental is a province of the Philippines located in the Davao Region in Mindanao. Its capital is Mati, Davao Oriental and borders Compostela Valley to the west, and Agusan del Sur and Surigao del Sur to the north. Davao Oriental is the easternmost province of the country with Pusan Point as the easternmost location. The Philippine Sea, part of the Pacific Ocean, faces Davao Oriental to the east. Part of the province lies on an unnamed peninsula that encloses the Davao Gulf to the west.
Final tabulation showed Yes got 18,267 votes while No garnered only 846. There are 18,267 actual voters out of the 51,287 registered voters in 26 villages and 266 polling precincts during the June 18 plebiscite. 
Mostly spoken in Cebuano but other people is Mandaya.The Tagalog is national language