Chakchegŏn
| Chakchegŏn | |
| Hangul | 작제건 |
|---|---|
| Hanja | 作帝建 |
| Revised Romanization | Jakjegeon |
| McCune–Reischauer | Chakchegŏn |
| Posthumous name | |
| Hangul | 경강대왕 |
| Hanja | 景康大王 |
| Revised Romanization | Gyeonggang Daewang |
| McCune–Reischauer | Kyŏnggang Taewang |
| Temple name | |
| Hangul | 의조 |
| Hanja | 懿祖 |
| Revised Romanization | Uijo |
| McCune–Reischauer | Ŭijo |
Chakchegŏn (Korean: 작제건; Hanja: 作帝建; MR: Chakchegŏn) was a Korean hojok, or local regional lord, of Songak during the late Silla. He was a powerful and rich figure in the region, with influence over local Yellow Sea maritime trade. He would become the grandfather of Wang Kon, the founder of Goryeo. After Goryeo's establishment, he was given a posthumous name of King Gyeonggang the Great along with his temple name of Uijo (의조; 懿祖) in 918. He was buried in Onhyereung tomb (온혜릉; 溫鞵陵).
In the founding legends of Goryeo, Chakchegon married the daughter of the Dragon King of the Western Sea. In some versions, he is also to have been the offspring of a travelling Tang nobleman who would later become either Emperor Suzong or Xuanzong depending on the version.