Icheon Seo clan is one of the Korean clans. Their Bon-gwan is in Icheon, Gyeonggi Province. According to the research held in 2015, the number of Icheon Seo clan was 199792. Their founder was Seo Sin-il who was a descendant of Jun of Gojoseon, Gija Joseon’s the last emperor. He lived at seoaseong in Icheon. He named their surname after the name of the place “Icheon”.