Gijang-gun is located at the eastern extremity of Busan Metropolitan City, on the southern tip of the Korean peninsula.
The Daeun Mountains, in the northwest area of Gijang, lies on the border of Yangsan City. The three towns of Gijang-gun,
Jangan-eup, and Ilgwang-myeon, in the eastern area, are adjacent to the East Sea.
The northeast area is on the border of Ulju-gun, and the southwest faces Haeundae-gu and Geumjeong-gu of Busan.