American First Credit Union is a federally insured credit union established in 1952 in Brea, California, originally serving grocery store workers. The institution expanded its field of membership in the early 2000s and now serves individuals and small businesses across Orange, Riverside, and San Bernardino counties, plus 14 surrounding cities, with partnerships extending membership through over 100 companies and community groups.

Financial Partners Credit Union is a federally chartered credit union based in Downey, California, serving members across Southern California. The institution provides a range of financial services including savings accounts, loans, and other consumer banking products. It operates as a community-focused financial cooperative.

Operating Engineers Local Union #3 FCU is a federal credit union serving members of Operating Engineers Local Union #3 and their families in the Livermore, California area. The credit union is chartered to serve construction and heavy equipment operators in Northern California. It provides standard financial services including savings, checking, and lending products to its membership base.

Wescom Central Credit Union is a federally chartered credit union headquartered in Pasadena, California, serving members across Southern California. It is one of the larger credit unions in the region with a focus on providing financial services to its membership base.