Pilar is a fifth class municipality on Siargao Island in the province of Surigao del Norte, Philippines. It is bounded by the Municipality of San Isidro to the north, Municipality of Del Carmen to the west, Municipality of Dapa to South and Philippine Sea to the east. It used to be a barrio of Dapa until its creation as a separate municipality on October 31, 1953 by virtue of Executive Order No. 638 issued by then President Elpidio Quirino. Pilar has a natural harbor through a small inlet called Port Pilar.