Dangun Wanggeom is the semi-legendary founder of Gojoseon, the first Korean kingdom, around present-day Liaoning, Manchuria, and the Korean Peninsula.

He is said to be the grandson of heaven, and to have founded the kingdom in 2333 BCE.

Although the term Dangun commonly refers to the founder, some believe it was a title meaning "high priest" used by all rulers of Gojoseon, and that Wanggeom was the proper name of the founder.

The earliest recorded version of the Dangun legend appears in the 13th century Samguk Yusa, which cites China's Book of Wei and Korea's lost historical record Gogi .