구곡산은 골짜기가 아홉 개가 있어 유래된 이름이며, 성안은 옛날 금오산성 안에 있던 마을이므로 붙여진 이름이다.
Gugoksan Mountain was named since there are nine valleys, and Seongan was named because it was a village in Geumosanseong Fortress in the past.