The Sagog Formation (Korean: 사곡층; Hanja: 舍谷層; RR: Sagok-cheung), also known as the Sagok Formation, is an Albian geologic formation in South Korea.

Fossil sauropod tracks have been reported from the formation.

[1] It is laterally equivalent to the Haman Formation.

[2] It predominantly consists of red to dark grey shale and sandstone.

[3]