Yosyf Shumlyansky (Ukrainian: Йосиф Іван Шумлянський, Polish: Józef Szumlański; 1643–1708) was an Eastern Catholic (previously Orthodox) bishop of the Eparchy of Lviv, Halych and Kamianets-Podilskyi (at the time in the Polish–Lithuanian Commonwealth), best known for restoring unity with the Holy See in year 1700.

Only with the accession of Jan Sobieski to the Polish throne, a personal friend of Yosyf, the latter managed to defeat his opponent.

At a locale council in 1700, Yosyf and the clergy of his diocese joined the Union of Brest under the leadership of the Metropolitan of Kiev, Galicia and all Ruthenia — Lev Zalenskyj.

The Lviv brotherhood first refused to follow the bishop and tried to remain Orthodox, but eventually relented and in 1708 also joined the union, directly subordinated to the Roman Curia.

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