Mt Diablo Unitarian Universalist Church (MDUUC)

Based on ARDA 2020 data, this is likely one of 49 Non-Denominational congregations in Contra Costa County, CA, with an average size of approximately 405 members. Non-Denominational accounts for 4% of the county's 716 congregations.

Source: ARDA 2020 Religious Congregations & Membership Study