The Principality of Volhynia (Ukrainian: Волинське князівство) was a western Ruthenian principality founded by the Rurik dynasty in 987 centered in the region of Volhynia in modern day Ukraine. From 1069 to 1118 it belong to Izyaslavychi who primarily ruled from Turov (see Principality of Turov). After losing Turov to Monomakhovychi in 1105, the descendents of Izyaslav Yaroslavovych for few years continued to rule in Volhynia. From 1154 to 1199 the principality was named Principality of Volodymyr when the Principality of Lutsk (1154-1228) was separated.
The principality held the lands of the historic region of Volhynia from where it acquired its name. The capital of the principality as well as the largest and most important city of the region was Volodymyr. Other notable cities in the principality include Kremenets, Lutsk, Busk, Dorogobuzh, Brest, Belz and Shumsk.
The Principality of Volhynia along with her sister state, the Principality of Halych were formed by lesser sons of the ruling Rurik dynasty in Kiev. Following the fragmentation of the Kievan Rus', the principality achieved autonomy in 1154.