[2] 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 island is connected (via Seongam-do and Tan-do) to the mainland in the south-east by road bridges, to Hyeong-do (형도) (and thence the mainland) in the north-east by several routes due to land reclamation efforts, and to Seonjae-do (선재도) (and thence Yeongheung Island (영흥도) and others) to the west by a further road bridge.

Due to rising mudflats, the island has merged with neighbouring Seongam-do (선감도) and Tan-do (탄도).

It is a Ramsar site and has also been designated an Important Bird Area (IBA) by BirdLife International because its intertidal mudflats support significant populations of breeding Chinese egrets, as well as of dunlins and common greenshanks on passage.

[3] During the Goryeo and Joseon Dynasties, Daebu Island was included in the old jurisdiction of Namyang.