The Kharchin (Mongolian: ᠬᠠᠷᠠᠴᠢᠨ, Харчин, qaračin; Chinese: 喀喇沁部), or Kharachin, is a subgroup of the Mongols residing mainly (and originally) in North-western Liaoning and Chifeng, Inner Mongolia.

Exact population data of the Kharchins in China is difficult to obtain because there was a great immigration of the Kharchins for Jindandao ethnic conflict during the late Qing dynasty, and that the former Josotu league was divided after the Qing dynasty and now belongs to the present three different provinces: Inner Mongolia, Liaoning and Heibei.

They submitted to the Qing dynasty in 1626, and was organized into three Kharchin banners in Josogtu league, each ruled by a ruler of the Uriankhai lineage.

The Yunsheebuu Tümen during the rule of Begersen Tayisi consisted of at least ten sub-tribes: Asud, Kharchin, Sharnud, Tav Aimag, Dalandaganad, Khonghutan, Shibaguchin, Nomochin, Buryat and Barga.

The Kharchin originated from the Kipchak guard troops served in Khanbalik or Dadu (today's Beijing, great capital of Yuan empire) and other Chinese areas, and also the Kipchak royal horse herder groups in the present Khovd Province and its neighborhood areas of Mongolia.

Some scholars also argue that the Kharchins were originated at least partly from the Khalaj of the historical Khorasan area in today's Iran and Afghanistan, who were a sub-group of the Oghuz or Arghu Turks.

Both Shibaguchins and Nomochins had multi-ethnic origins, they were served for the Yuan emperors when they went for hunting to the Tsagan Nuur moving imperial palace of Yuan empire's upper capital Xanadu (Kaiping), located in the present Plain Blue Banner, Shilingol League, Inner Mongolia.

Yuan court set up Yunxufu to administer the moving imperial palace, It's believed that Shibaguchin and Nomochin adopted Yunsheebuu, the Yunxufu's alternative name in Mongolian, as their common tribal name after they evolved as a nomadic tribe on the steppes.

Orchuu led the whole tribal alliance to immigrate to the southwestern Inner Mongolia, and they began to be considered as a branch of the right wing of the eastern Mongols.

Dalandaganad and Khonghutan were surmised as people of Bayanmönkh Jinong (assistant Khaan), who was father of Dayan Khan.

Orchuu's daughter Sikher Taikhu was a queen of Bayanmönkh Jinong and the mother of Dayan Khan.

The Bekrin's Begersen Tayisi immigrated from Uighurstan to Southwestern Mongolia, he defeated Orchuu there and became the leader of the Yungsiyebu Tümen.

The Uriankhai clan formed the Doyin Guard (Doyan in Chinese language) on the Chaor River.

The core branch of the Doyan Uriankhai were people of the uls (kingdom) of King Eljitai, who was a son of Genghis Khan's younger brother Khajiun.

According to Rashid al-Din, there were three larger tribes of the Naimans, the Tatars, the Uriankhai, and some unknown smaller ones in Eljitai Uls.

A group of the Uriankhai was also appointed to guide the altar of Queen Hoelun, the mother of Chinggis Khaan.

They seemed different from the Uriankhai of Uljitai Uls at first, but for unknown reasons they immigrated from the Uls of Queen Hoelun and her youngest son Temüge to join the Doyan Uriankhai and guarded the altar of Queen Hoelun in Ekh Doyan Öndör Mountain area, located in the today's Jalaid banner, Xing’an league, Inner Mongolia.

The Doyan Uriankhai were conquered and absorbed by the Chakhar and the Inner Halha in the north, and by the Kharchins and the eastern Tümed and the Mongoljin in the south.

The Zaruud (Зарууд) known as one of the Inner Khalkh were people of Doyan Uriankhai's Bagasun Tabunang (Багасун-Табунанг) who married Dayan Khaan's only daughter.

Esen Khaan of the Choros (Чорос) Oirad also claimed him as the seventh generation offspring of Uriankhai General Zelme according to some historical resources.

Haichid, Hailasud, Garhata, Shiranud, Narad, Marud, Nuled and other family names of the Mongols were considered to link with the Naimans.

The Yuwen was originally a Southern Xiongnu (Hsiung-nu) who immigrated from the present Southwestern Inner Mongolia to the eastern steppes inhabited by the Xianbei (and Wuhuan) and mixed with them there, that was similar to what happened to Yunsheebuu and Doyan Uriankhai later.

There were the eight Khitan's ancient tribes recorded by Chinese: Xiwandan, Hedahe, Fufuyu, Xiling, Rilian, Pijie, Li, Tuliuyu.