Hwawangsansŏng (Korean: 화왕산성; Hanja: 火旺山城) is an ancient Korean fortress on the mountain Hwawangsan in Changnyeong County, South Gyeongsang Province, South Korea.

[1] On January 21, 1963, it was made Historic Site of South Korea No.

[2] The fortress was first established around the 5th century as an earthen fortification.

It was rebuilt using stone during the Unified Silla period in the 9th century.

[1] During the 1592–1598 Imjin War, Kwak Chaeu used the fortress.