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About Cornerstone Credit Union

What is a Credit Union?

Credit unions are not-for-profit financial cooperatives: When you join a credit union, you own a piece of it and have a say in how it’s run. Credit unions exist to serve their members, not to make a profit. That means their number one concern is not money, but members. That translates into great rates, low fees and exceptional service.

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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."

Our Commitments

"People Helping People" is the credit union motto. Cornerstone Credit Union lives up to this through our Community Involvement, which has been a challenge during the COVID situation. We offer valuable Financial Education resources; the latest news on Scams, special programs & more; our Video Library; and our monthly radio broadcasts. Please take a moment to discover these important areas and click around our website to see all we have to offer in products and services to help you live a financially stable lifestyle. 

Cornerstone Credit Union
1-800-711-3277  •  Routing: 271184425  •  NMLS #743907

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Your deposits are federally insured up to $250,000 by the National Credit Union Administration (NCUA), with an added safety net of private insurance (Excess Share Insurance/ESI) for an additional $250,000. This is the highest combination of federal and private insurance available to consumers.