Ugeo (Korean: 위우거; Hanja: 衛右渠, died 108 BC) was the last king of Wiman Joseon, the last remnant of Gojoseon. He was a grandson of Wi Man.

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Ugeo was killed by an assassin sent by a faction advocating surrender. Even after the death of Ugeo, Gojoseon resisted the Han forces until 108 BC but lost and the Four Commanderies of Han were then set up.

• Wi Man (Hanja:衛満), grandfather and first king of Wiman Joseon
• son and successor, name not recorded
• Wi Jang (Hanja:衛長降), Son

Around the period from 128 BC to 126 BC, Canghai Commandery,covering an area in northern Korean peninsula to southern Manchuria,existed. Nan Lü (Hanja:南閭), who was a monarch of Dongye and a subject of Wiman Joseon, revolted against Ugeo of Gojoseon and then surrendered to the Han dynasty with 280,000 people.^{[lower-alpha 1]} The Canghai Commandery was established following this revolution, however in 2 years, it was abolished by Gongsun Hong.^[1]

• Korea in 108 BC. Wiman Joseon before destroyed by Han dynasty.
• Han Dynasty destroys Wiman Joseon, and establishing the Four Commanderies.

• Wiman of Gojoseon
• Gojoseon
• Wiman Joseon
• Han conquest of Gojoseon