Bloch married in 1931 Dr. Bronia Biedermann, an ophthalmologist, who studied medicine at the University of Prague. He and his wife had three daughters, Rivka (Rebecca) and the twins Navah and Naomi. Rivka Weinshall holds a BA degree in Middle East Studies from the Hebrew University of Jerusalem, Navah Bloch Rodrigue is a lawyer who studied law at Tel-Aviv University, and Naomi Eibschitz is an ophthalmologist who worked at Haifa's Bnai Zion Medical Center and studied medicine at the University of Geneva.