The Principality of Halych is a Kievan Rus' principality established in around 1124 established by the grandson of Rostislav Ihor Vasylkovych (Baptized as John).

According to Mykhailo Hrushevsky, the realm of Halych was passed to Rostislav upon the death of his father Vladimir Yaroslavich, but he was banished out of it later by his uncle to Tmutarakan.

The realm was then passed to Yaropolk Izyaslavich who was a son of the ruling Grand Prince of Kiev Izyaslav I of Kiev.