Temple B'Nai Israel is an historic former Jewish synagogue and former Masonic hall, located at 265 West Main Street in New Britain, Connecticut, in the United States.

Some modifications were made to convert it for use as a synagogue, but since both organizations had similar needs (including both office and meeting rooms and a large assembly space), the building readily accommodated the new function.

[3] Crabtree also designed the Francis H. Holmes House in New Britain and the Universalist Church of West Hartford, both also listed on the National Register.

Members of the congregation who held to Orthodox views split off, and built Tephereth Israel Synagogue.

[6] As of January 2024[update], the Assemblies of God Fortress City Church was worshipping in the historic building.