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St. Mary's Credit Union serves Massachusetts' Middlesex, Worcester, Norfolk and Suffolk Counties with branches conveniently located in Marlborough, Hudson, Northborough and Westborough. Find the one nearest you and make it your one-stop source for all your financial needs.

In addition to our branch ATMs, members can also access cash via thousands of surcharge-free CO-OP and SUM Network ATM locations nationwide.

For a complete listing of holiday closings, please check out our Holiday Schedule.

Our general mailing address is: St. Mary's Credit Union, PO Box 729, Marlborough, MA 01752

Our loan payment mailing address is: SMCU Payment Processing Center, PO Box 4144, Woburn, MA 01888-4144