Sinai Temple (Hebrew: סִינַי) is a medium-sized Reform Jewish synagogue located in Springfield, Massachusetts, New England's fourth largest city (population 153,060). Founded in 1931, Sinai was the first Reform congregation in Springfield. The congregation's first rabbi, David M. Eichhorn, was hired in 1932 and let go just two years later due to financial difficulty brought on by the Great Depression, though he went on to become a prominent American rabbi and authority on interfaith marriage and conversion for the Reform movement.