Banks & credit unions in Marlborough, MA

2 institutions headquartered in Marlborough — 1 bank and 1 credit union, holding $2.7B in combined assets. Ranked by Bankzia Trust Grade.

Banks in Marlborough

1
Main Street Bank
bank · Marlborough, MA · $1.6B assets · 24 complaints

Credit unions in Marlborough

1
St. Mary's
credit union · Marlborough, MA · $1.0B assets

From the Blog

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Banking Guides
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Banking Guides
How to Switch Banks Without the Headache
Switching banks sounds painful, but a clean move comes down to a short checklist: open the new account, move your automatic payments, then close the old one carefully.
June 25, 2026 · 5 min read
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State Guides
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State Guides
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State Guides
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State Guides
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