Daebu Island is an island in the Yellow Sea, within the municipal borders of Ansan city, Gyeonggi province. It has a population of roughly 7,114 people and an area of 41.98 km². Due to rising mudflats, the island has merged with neighbouring Seongam-do (Hangeul:선감도) and Tan-do (탄도). Administratively, the island today is divided into five dong: Daebubuk-dong (대부북동), Daebunam-dong (대부남동), Daebudong-dong (대부동동), Seongam-dong (선감동) and Pungdo-dong (풍도동). The predominant industries are tourism and fishing.