DuPage County Employees Credit Union is a federally chartered credit union headquartered in Wheaton, Illinois, serving employees of DuPage County government and related organizations. The credit union provides financial services including savings, checking, and lending products to its membership base.

Empeople Credit Union is a federally chartered credit union serving the Moline, Illinois area and surrounding communities. The institution provides financial services including savings, checking, loans, and other member-focused products. It operates as a community-based credit union with a focus on serving local members.

Great Lakes Credit Union is a federally chartered credit union located in Bannockburn, Illinois, serving members in the Chicago metropolitan area and surrounding regions. The institution provides traditional banking services including savings accounts, loans, and other financial products to its membership base.

Alliant Credit Union is a federally chartered credit union headquartered in Chicago, Illinois. It is one of the largest credit unions in the United States by assets and membership. Alliant operates as an online-focused institution serving members nationwide with competitive rates on savings and lending products.

1st MidAmerica Credit Union is a not-for-profit financial cooperative headquartered in Bethalto, Illinois, founded in 1934 as the Western Cartridge Company Employees Credit Union. It serves over 63,000 members across 10 branches in Illinois and Missouri, offering mortgages, auto loans, checking accounts, and investment services. The credit union is the 14th largest in Illinois and operates under an Illinois state charter.