Sanbon-dong[a] is a dong, or neighborhood, in Gunpo, a satellite city of Seoul in Gyeonggi Province, South Korea.

Its name can be translated as "the mountain's root," and refers to its position at the base of Surisan's eastern flank.

On the other side of Surisan (475 metres (1,558 ft)) lies Anyang City.

The administrative entity of Sanbon was formed in 1914, as part of a general nationwide consolidation of local government under the Japanese occupation.

Other landmarks include various Joseon Dynasty relics: a large kiln site, a shrine of the royal Jeonju Yi clan, and the tomb of 17th-century scholar Hoam Yi Gi-jo.