Yisroel Hager (born April 19, 1945), is one of the two Grand Rabbis of Vizhnitz in Bnei Brak and a member of Moetzes Gedolei HaTorah (Council of great Torah Sages) of Agudat Israel.

Shortly after his marriage, he was appointed by his grandfather Grand Rabbi Chaim Meir Hager (1887-1972), to serve as a rabbi of the Vizhnitz synagogue and a few years later, in 1972 (after his grandfather died and his father took over the leadership of the Vizhnitz Chassidim), he served as the Chief Rabbi of the Kiryas Vizhnitz neighborhood in Bnei Brak.

In 1984, his father's orders, he was removed from his position as a Chief Rabbi and was exiled from the Vizhnitz neighborhood as well.

In 1990, his father appointed his younger brother, Menachem Mendel Hager, as a Chief Rabbi of Kiryas Vizhnitz .

Rabbi Yisroel and Rebbetzin Sarah Chaya Chana have eight children - three sons and five daughters: