Nairi (Armenian: Նայիրի in TAO or Նաիրի in RAO) was the Assyrian name (KUR.KUR Na-i-ri, also Na-'i-ru) for a confederation of tribes in the Armenian Highlands, roughly corresponding to the modern Van and Hakkâri provinces of modern Turkey. The word is also used to describe the tribes who lived there, whose ethnic identity is uncertain. Nairi has sometimes been equated with Nihriya, known from Mesopotamian, Hittite, and Urartean sources. However, its co-occurrence with Nihriya within a single text may argue against this.
During the Bronze Age collapse (13th to 12th centuries BC), the Nairi tribes were considered a force strong enough to contend with both Assyria and Hatti. The Battle of Nihriya, the culminating point of the hostilities between Hittites and Assyrians for control over the remnants of the former empire of Mitanni, took place there, c. 1230 BC. Nairi was incorporated into Urartu during the 10th century BC.
According to Trevor Bryce the Nairi lands were inhabited by what he calls "fierce tribal groups" divided into a number of principalities, and are first mentioned by Tukulti-Ninurta I (1243–1207 BC) when he defeated and exacted tribute from forty Nairi kings. The names of twenty-three Nairi lands were recorded by Tiglath-Pileser I (1114–1076 BC). Their southernmost point was Tumme, known to have been south-west of Lake Urmia, and their northern one Daiaeni. These lands are known from the list of defeated kings: "the king of Tumme, the king of Tunube, the king of Tuali, the king of Kindari, the king of Uzula, the king of Unzamuni the king of Andiabe, the king of Pilakinni, the king of Aturgini, the king of Kulibarzini, the king of Shinibirni, the king of Himua, the king of Paiteri, the king of Uiram, the king of Shururia, the king of Albaia, the king of Ugina, the king of Nazabia, the king of Abarsiuni, and the king of Daiaeni." It is believed that Nairi extended from the Tur-Abdin mountains in the south to the mountainous area southwest of Lake Van in the north.