Tyari (Syriac: ܛܝܵܪܹܐ, romanized: Ṭyārē) is an Assyrian tribe and a historical district within Hakkari, Turkey. The area was traditionally divided into Upper Tyari (Tyari Letha) and Lower Tyari (Tyari Khtetha)–each consisting of several Assyrian villages. Both Upper and Lower Tyari are located on the western bank of the Zab river. Today, the district mostly sits in around the town of Çukurca. Historically, the largest village of the region was known as Ashitha. According to Hannibal Travis the Tyari Assyrians were known for their skills in weaving and knitting.

Before 1915, Tyari was home to Assyrians from the Bet Tyari tribe as well as a minority of Kurds and Armenians. Following the Assyrian genocide, Ṭyārāyē, along with other Assyrians residing in the Hakkari highlands, were forced to leave their villages in southeast Anatolia and fled to join their fellow Assyrian brethren in modern-day northern Iraq (Sarsink, Sharafiya, Chammike and various villages in the Nahla valley), northeastern Syria (Tel Tamer and Al Hasakah), Armenia, Georgia and, from the late 20th century, to western countries. The Tyari tribe was, according to Robert Elliot Speer, one of the Assyrian "ashirets". In 1869 there were 15,000 Tyari Assyrians living in 2,500 houses in the Tyari district according to John George Taylor in a report to the Earl of Clarendon. The Tyari Assyrians lived across 51 different villages and constituted 50,000 members - making it the most powerful among the semi-independent Assyrian tribes. The Tyari district is located in the boundaries of the ancient Neo-Assyrian kingdom of Adiabene.

It is worth particular notice that the most central parts of this region are, and have been from time immemorial, entirely inhabited by the Nestorians, to the exclusion of every other class of people. A great part of the Independent tribes of Tiari [Tiyari] and the whole of the tribes of Tekhoma, Bass, Jelu and other smailer tribes, are included in the boundaries of Adiabene.

— Asahel Grant, "The Nestorians, Or, the Lost Tribes", (1841)

Tyari may be a variation of the ancient "Autiyara" (Assyria). American historian Albert T. Olmstead describes in his work History of the Persian Empire how the Persian General Vaumisa wins a battle in the Autiyara districts located in Tyari and mentions that this is where Assyrian Christians maintained independence until modern times.

In Syriac, the word ṭyārē (ܛܝܪ̈ܐ) is the plural form of ṭyārā, meaning "sheepfold" or "grazing area". Indeed, the Assyrians of Tyari were renowned even amongst neighboring Kurds and Armenians for their yogurt, cheese and other dairy products mostly made from sheep or goat's milk. They were also famous for their textiles, which again were spun and woven from sheep's wool. They also made woolen felt for their characteristic conical caps, a style dating back to the Assyrian Empire.

One of the reasons the Assyrians of Tyari were able to stay independent for so long despite being significantly outnumbered by Turks, Kurds and Arab Muslims was their fighting ability. The Assyrians of Tyari were especially known for being a fierce, warlike people. It was said that they were the best fighters in West Asia, along with the Assyrian tribe of Tkhuma. Their Muslim neighbors stated that in order to stand a chance they needed to outnumber the Assyrians of Tyari or Tkhuma five to one, and have superior modern weapons. Assyrians of Tyari used much older weaponry and manufactured their own weapons and ammunition.

In 1834 the leader of the Soran Emirate Muhammad Pasha of Rawanduz tried to subdue the Assyrians of Lower Tyari, but suffered a humiliating defeat at the hands of the vastly outnumbered Assyrians. They then chased the Kurds and Turks back to Amadiya. This defeat played a major role in the collapse of the Soran Emirate.