Hayyim Yitzhak HaCohen Bloch (Hebrew: חיים יצחק בלוך הכהן; 1864–1948) was a prominent Lithuanian born rabbi. In 1922 he left Latvia for the United States, where he became the Rabbi and Av Beit Din (head judge of religious court) of Jersey City, New Jersey. He remained there until his death in 1948.