Jukdo () is a small island in Jeodong-ri, Ulleung-myeon, Ulleung County, North Gyeongsang Province, South Korea. It is next to the island Ulleungdo in the Sea of Japan. It is also known as Jukseodo (). It lies east of Ulleungdo, and is the largest island in the group apart from Ulleungdo itself. In 2004, one family of three members was living on the island.
Jukdo island measures long and wide.