The Universalist Unitarian Church of Riverside, previously known as the All Souls Universalist Church, is a Universalist Unitarian church located in Riverside, California, United States.

It was built during 1891-92. It was listed on the National Register of Historic Places as “All Souls Universalist Church” in 1978.^[3] Also it is listed as Riverside city landmark #3.^[1][4]

It is a rare and elegant example, perhaps the only example for its era, of architecture in California using the Permian age Supai sandstone of the Arizona plateau area.