Seongju is a town, or eup in Seongju County, North Gyeongsang Province, South Korea.

The township Seongju-myeon was upgraded to the town Seongju-eup in 1979.

Seongju County Office is located in Gyeongsan-ri which is crowded with people, and Seongju Town Office is in Seongsan-ri.

Seongju-eup is divided into 10 villages (ri).

This South Korea location article is a stub.