The southern belt of Geojedo, together with part of Namhaedo in Namhae County, belongs to Hallyeo Maritime National Park.

When the Japanese invaded Tongyeong in 1592, the Navy Headquarters of Three Provinces was established in Geoje which served as a command for many naval battles in the area.

[4]: 259–60  Koje Unscreened (1953), written by journalists Alan Winnington and Wilfred Burchett, focused on the poor conditions in the camp.

[5][6] In 1953, Geoje became an independent county, and in the early 1970s the shipbuilding industry began producing ships, which led to population growth.

[8] It was the final port of call of the SS Meredith Victory at Christmastide 1950, when that ship evacuated some fourteen thousand North Korean civilians from Hungnam.