Our History

Cornerstone Credit Union has been “Rock Solid” since its founding in 1939 as MICRO SWITCH Employees’ Credit Union. Today, we serve more than 13,600 members and are open for membership to anyone who lives or works in the following northwest Illinois and southern Wisconsin counties. Illinois: Boone, Bureau, Carroll, JoDaviess, Ogle, Lee, Stephenson, Whiteside, and Winnebago Counties. Wisconsin: Green and Rock Counties. Family members of current CCU members also can join.

Our Mission

"Cornerstone Credit Union is a community-focused financial cooperative committed to providing quality, differentiated services to its member owners. Our professional staff and volunteers will ensure fiscal stability through responsible leadership and growth."

Thank you for visiting our website. We look forward to putting our mortgage service to work for you!