Kurunta was a Hittite king, a son of Muwatalli II born in the 13th century BC, and cousin of Tudhaliya IV. Kurunta is a Luwian name; he also bore the Hurrian name Ulmi-Tessup (often spelled Ulmi-Teshub").
He was named after an Anatolian tutelary deity in the Late Bronze Age frequently associated with stags.
The sources on Kurunta's life include two treaties between Hattusa and Tarhuntassa, mention in the so-called Tawagalawa Letter, numerous seals, and a rock inscription.
Muwatalli entrusted Kurunta to his brother Hattusili III to raise in his own household. Hattusili's son Tudhaliya, in his later treaty with Kurunta, claims that the two developed a deep bond of friendship.
A significant event in Muwatalli's reign, which probably influenced the later course of Kurunta's life, was his transfer of the Hittite court to Tarhuntassa in south-central Anatolia.
In the struggle for the throne between Mursili III and Hattusili, Kurunta gave his loyalty to Hattusili. His reward was rich: after seizing the throne, Hattusili granted him vassal kingship over Tarhuntassa, his father's former capital. In that treaty he bore the name Ulmi-Tessup. However, most of the territory under Tarhuntassa's nominal sway had fallen into the hands of Lukkan warriors acting with support from Ahhiyawa. Kurunta apparently spent all of Hattusili's reign slowly reconquering the lost territory.
A bronze tablet found in Hattusa records a treaty between Tudhaliya IV and Kurunta, wherein Tudhaliya re-grants Kurunta authority over Tarhuntassa. At the time the treaty was sealed, it is clear that Kurunta was still actively reconquering the west, where the city Parha (Classical Perge in Pamphylia) was expected to fall into his hands. For modern scholarship, this treaty is very important, as it has been used to resolve many of the disputes about west Anatolian geography. Further, it is in a state of near perfect preservation, making it a rare and valuable artifact.