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About Us

GCS Credit Union has been in Illinois providing loans, basic savings, and other banking services since 1941! We started as a single location, but have grown to support Madison, St. Clair, Jersey, Macoupin, Montgomery, Bond, Clinton, Washington, Randolph, and Monroe counties. 

There are many benefits to joining a credit union. We are a not-for-profit, member-owned financial cooperative. We focus on our members' financial needs, and aren't interested in making a profit off of them. Meet with one of our GCS Credit Union employees to learn more about how joining a credit union can benefit you and your comunity. 

GCS - we're here when you're ready!

GCS Credit Union

GCS is a full service financial institution serving the following counties in Illinois: Madison, St. Clair, Jersey, Macoupin, Montgomery, Bond, Clinton, Washington, Randolph, and Monroe.

(618) 219-8600
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1119 S. Lincoln Ave.
O'Fallon, IL  62269

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