Seongjin Jeup clan () is one of the Korean clans. Their Bon-gwan is in Kimchaek, North Hamgyong Province. According to the research held in 2000, the number of Jeup clan of Seongjin was 86. Their founder was , who was born between a Korean mother and a Japanese father. was dispatched to Korea as an employee of a railroad company when Korea was colonized by Japan. was naturalized in 1954 while in his teenage years, following his mother. At that time, founded Jeup clan of Seongjin.