Vasylko Rostyslavych, Vasilko Rostislavich (Ukrainian: Василько Ростиславич) was a Rus' prince and member of the Rurik dynasty. He was the first Prince of Terebovl' from 1092.
He was the third son of Rostislav Vladimirovich, Prince of Tmutarakan. The historian Martin Dimnik writes that Vasylko's mother was Lanka, a daughter of King Béla I of Hungary.