Mount Sinai Temple is an historic former Reform synagogue located in Sioux City, Iowa, in the United States.

However, the Reform Jewish community had organized a cemetery association in 1869 and had been worshipping regularly in concert with the Unitarian Church of Sioux City.

[5] The Mount Sinai Temple was designed by George Washington Burkhead in the Queen Anne-style, was built as a 1+1⁄2-story, frame, clapboard- and shingle-sided, building, and opened in 1901.

[2][5][6] Between World Wars I and II the Jewish Community Center in Sioux City hosted 60 to 70 clubs, classes, and organizations that ranged from socialist workers to Zionists.

In 1994, the Conservative Shaare Zion and the Reform Mount Sinai congregations merged into a dual-affiliation synagogue called Beth Sholom.