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Our History

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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.

Easily Switch to CCU
- Enroll in CCU Online Banking video
- 80th Anniversary Timeline

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. We also offer valuable Financial Education resources; the latest news on Scams, special programs & more; our Video Library. 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

Who We Are

We believe you'll appreciate the credit union difference, offering personalized financial solutions and rock solid advice with better rates, lower fees and affordable services to help you achieve a financially stable lifestyle.

Your Security

Your financial security is important and we take several precautions to ensure your digital information is secure. To access your accounts, you must first be enrolled in Online Banking. You must enter your Logon ID and a Security Code to gain access. As a security precaution, we store your Security Code in our database in an encrypted format that even we cannot decode. 

Who Can Join

Applying is easy by clicking here. You are eligible for membership if you live or work in Boone, Bureau, Carroll, JoDaviess, Lee, Ogle, Stephenson, Whiteside, or Winnebago counties in Illinois; or Green or Rock counties in Wisconsin. Membership is also open to family members of current Cornerstone CU members.

Prefer In-Person Service?

Stop by a Cornerstone CU Service Center and open a primary savings account with a minimum deposit of $25. As long as you maintain this minimum deposit, you'll be a member-owner for life.