The Hor States (Tibetan: ཧོར་དཔོན་ཁག་ལྔ།, Wylie: hor dpon khag lnga; Chinese: 五霍爾; lit. 'Five Hors'), also known as the Horpa States, were a group of principalities located in the Tibetan region of Kham that existed from the 14th century to the mid-1900s.

Today, the historical territory of the Hor States comprises Garzê County, Luhuo County, and part of Dawu County.

The name "Hor" is usually considered to be Turkic or Mongolic; because the Hor states were Tibetic in culture, their population is thought to be Mongols that were influenced by Tibetic culture.

The Hor States located in the region traditionally called Tré or Tréshö (Tibetan: ཏྲེ་ཤོད།, Wylie: tre shod) in northern Kham on the upper portion of the Yalong River. Under the rule of the Hor States, the region also gained the names of Tréhor and Horkhok (Tibetan: ཧོར་ཁོག, Wylie: hor khog).

The traditional five states were:

The Chinese also included two other states as Hor States, but they were not included in the Tibetan list:

According to the rGya bod yig tshang, at the time of Trisong Detsen (755–797), there was an ancient kingdom in the lands of lDan, sGa and Tre bo, whose descendants founded the house of Sharkhapa in Gyantse. It may be identified as the Kingdom of Khrom of King Gesar. Another tradition claimed that in the same period, Tréshö was ruled by the clan of Achak Dru (Wylie: a lcags 'bru), centered in Draku (Wylie: brag u) within the modern Luhuo County (Wylie: brag mgo). In the 8th century, the Achak Dru ruler Trewo (Wylie: kre bo) patronized the great translator Cogro Lü Gyaltsen (Wylie: cog ro klu’i rgyal mtshan) to establish the first monastery in the region called Cogro Monastery (Wylie: cog ro dgon). It was later converted to Gelug and renamed as Cogri Monastery (Chinese: 覺日寺).

During the era of fragmentation, the area was notable as the birthplace of several religious figures, including the 1st Karmapa, Düsum Khyenpa (1110–1193), founder of the Karma Kagyu school of Tibetan Buddhism.