How big is Reform Judaism?
According to the 1993-1994 yearbook of the Union for Reform Judaism, there are 853 member congregations, with a total “member unit” membership of 302,193 member units. The term “member units” refers to the unit that joins a synagogue: a family, a single individual, a gay couple. There are also numerous congregations that are Reform but are not affiliated with URJ. Some of these are quite large (such as Steven S. Wise Congregation in Los Angeles, with over 2,000 member units).