Yitzhak Weinstein-Branovsky (Lithuanian: Aizikas Vainšteinas-Branovskis, Russian: Айзик Вайнштейн-Брановский, Polish: Ajzik Wajnsztajn-Branowski; 1888–1938) was a Bolshevik revolutionary. He served as a senior government official in the Lithuanian Soviet Republic and the Lithuanian–Belorussian Soviet Republic, serving as a People's Commissar in both republics in 1918–1919.