First Congregational Church of Riverside, Spanish Colonial Revival church on Mission Inn Avenue, Riverside, United States.

First Congregational Church is a two-story Spanish Colonial Revival building at 3504 Mission Inn Avenue in Riverside, California. Designed by Myron Hunt and built in 1913, it has a Latin cross plan and a 125-foot Churrigueresque-style corner tower.

The church was designed in 1913 by architect Myron Hunt and stands as one of the area's early 20th-century structures. It received designation as a historic landmark in the late 1990s.

Founded in 1872, the congregation belongs to the United Church of Christ and has a long record of social activism; it describes itself as a progressive Christian voice for the Inland Empire. The Rev. Michelle E Freeman is listed as senior pastor. The church grounds can be rented for conferences.

The site welcomes visitors during services and community events, when you can step inside to view the interior. Check ahead before planning a visit to ensure access and see what is happening on the day you wish to go.

The church combines Churrigueresque tower elements with Mediterranean design details in its facades and rooms. Stained glass windows throughout add another layer of visual interest and create patterns of colored light inside.