Temple Isaiah of Contra Costa County is a reform synagogue located in Lafayette, which claims to be the oldest and largest in the county. It offers a range of services, including worship, programs for youth, teens and adults, music and lifestyle and transition services. The temple also hosts a range of events, and is a member of the Union for Reform Judaism.
The temple has a gift shop, a library, and offers rentals of its facilities. There is also an adjoining preschool, which offers early childhood education.