| Native Name: | Terebovlianske kniazivstvo |
| Conventional Long Name: | Principality of Terebovlia |
| Common Name: | Terebovlia |
| Subdivision: | Principality |
| Nation: | Kievan Rus' |
| Year Start: | 1084 |
| Event End: | United with Zvenyhorod Principality and Principality of Peremyshl |
| Year End: | 1141 |
| P1: | Kievan Rus' |
| Flag P1: | Alex K Sviatoslav.svg |
| S1: | Principality of Halych |
| Flag S1: | Alex K Halych 2.svg |
| Capital: | Terebovlia |
The Principality of Terebovlia (Ukrainian: Теребовлянське князівство) was a principality of Kievan Rus' established as an appanage around the year 1084 and given to Vasylko Rostyslavych. However, Volodar Rostyslavych and Rurik Rostislavich, ruled Peremyshl (Przemyśl) and Zvenyhorod respectively.
See also: Red Ruthenia. A southeastern appanage principality of Kievan Rus, the capital of which was Terebovlia. Its territories included parts of southeastern Galicia, Bukovina, and western Podolia. It bordered on Kiev principality to the east, Zvenyhorod principality to the west, and parts of Principality of Volodymyr, Lutsk principality, and Peresopnytsia principality to the north.
Vasylko Rostyslavych extensively colonized the territories southeast of Terebovlia by employing Turkic peoples (Berendeys, Torks, and Pechenegs), and he annexed Ponyzia, thereby securing it against nomadic raiders. Halych gained importance as a political and economic center; other important cities and fortresses included Terebovlia, Mykulyn (now Mykulyntsi), Chern (now Chernivtsi), Vasyliv (Bukovina), Onut, Kuchelemyn, Bakota, Ushytsia, and Kalius. After Vasylko Rostyslavych died in 1124, Halych principality seceded, and by 1141 Terebovlia principality had become a part of the Principality of Halych. After the Rostyslavych dynasty died out, it was briefly an appanage principality under Iziaslav Volodymyrovych.