The history of settlement in the territory of modern Geoje dates back to ancient times. Archaeological finds, including dolmens and burial mounds, indicate that humans have lived here since the prehistoric era. During the early Korean states period (Samhan), this territory was part of the Byeonhan tribal confederacy under the name Dokno. The city and island received their current name, which can be translated as "Great Salvation," in 757 AD during the administrative reforms of King Gyeongdeok of the Unified Silla Dynasty.
The formation of Geoje as an important regional center was predetermined by several key factors:
- Geographical Position: As Korea's second-largest island, Geoje occupied a strategically vital position in the South Sea, serving as a natural bridge between the mainland and the open ocean.
- Military Strategy: Historically, the island served as a frontline defensive outpost. During the Joseon Dynasty, it hosted important naval bases to protect against Japanese pirates and invasions. It was in the waters off Geoje that Admiral Yi Sun-sin won his first victory at the Battle of Okpo in 1592.
The traditional way of life in Geoje was shaped by the sea for centuries. The early economy was based on fishing, harvesting seafood, and coastal trade. Due to the rocky terrain, agriculture was less developed, making residents dependent on marine resources.
An interesting cultural feature of the past was the island's role as a place of exile. Due to its relative isolation from the capital, disgraced scholars and officials were often sent here. This led to a unique cultural exchange: exiled intellectuals brought Confucian traditions, literacy, and art to the local communities.