Khamag Mongol (Mongolian: Хамаг монгол, lit. "Whole Mongol") was a major Mongolic tribal confederation (khanlig) on the Mongolian Plateau in the 12th century. It is sometimes also considered a predecessor state to the Mongol Empire.

Existence of a somewhat mysterious tribal power known in Mongol tradition as Khamag Mongol Uls recorded in sources of Khitan Liao dynasty (907-1125) in North China and eastern Mongolia. After the fall of Liao dynasty in 1125, the Khamag Mongols began to play an important role on the Mongolian plains. They occupied one of the most fertile lands of the country, the basins of the river Onon, Kherlen and Tuul Rivers in the Khentii Mountains. The Taichiud (Cyrillic: Тайчууд) was one of the three core tribes in the Khamag Mongol Khanate of Mongolia during the 12th century and whose people lived in the southern part of Russian Zabaykalsky Krai. Zabaykalsky Krai and the Mongolian Khentii Province were core regions of the Khamag Mongol Khanate. The Khamags consisted of the four core clans Khiyad, Taichuud, Jalairs and Jirukhen.

The first khan of Khamag Mongol recorded in history is Khabul Khan from the Borjigin clan. Khabul Khan successfully repelled the invasions of the Jurchen Jin armies. Khabul Khan was succeeded by Ambaghai Khagann of the Taichiud. Ambagai was captured by the Tatar confederation while delivering his daughter for marriage to their leadership. He was handed over to the Jin, who cruelly executed him. Ambaghai was succeeded by Hotula Khan, a son of Khabul Khan. Hotula Khan engaged the Tatars in 13 battles in an effort to obtain vengeance for the death of Ambagai Khan.

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