FDIC-insured bank
Main Street Bank — Marlborough, MA
Bank headquartered in Marlborough, Massachusetts, part of MAIN STREET GROUP BANCSHARES MHC.
Source: FDIC BankFind Suite, data as of June 30, 2026, fetched September 5, 2026
Headquarters and contact
| Address | 81 Granger Blvd Marlborough, MA 01752 |
| County | Middlesex |
| Metro area | Boston-Cambridge-Newton, MA-NH |
| Website | www.bankmainstreet.com |
| Phone | not published in FDIC data, see the bank's website |
FDIC record
| FDIC Certificate | 90235 |
| Federal Reserve RSSD ID | 818401 |
| Status | Active |
| Charter class | SI (STATE) |
| Holding company | MAIN STREET GROUP BANCSHARES MHC |
| Domestic offices | 6 |
| Financials as of | June 30, 2026 |
How to find your Main Street Bank routing number
FDIC does not publish ABA routing numbers, and many banks use different routing numbers by state or by account type. The reliable places to find yours: the bottom left of a check from this bank, the "account details" screen in its online banking, or its official website at www.bankmainstreet.com.
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Offices nearest to headquarters
| Main Street Bank main office Marlborough, MA |
81 Granger Blvd, 01752 |
| Southborough Branch Southborough, MA |
6 E Main St, 01772 |
| Hudson Branch Hudson, MA |
186 Main St, 01749 |
| Northborough Branch Northborough, MA |
101 W Main St, 01532 |
| North Middlesex Svgs Br Ayer, MA |
7 Main St, 01432 |
| Pepperell Branch Pepperell, MA |
80 Main St, 01463 |
Where Main Street Bank has offices
Cities with the most Main Street Bank offices
Largest banks headquartered elsewhere in Massachusetts
| State Street Bank and Trust Company Boston | $412.62 billion |
| Eastern Bank Boston | $31.13 billion |
| Rockland Trust Company Rockland | $24.97 billion |
| Beacon Bank and Trust Boston | $22.20 billion |
| Salem Five Cents Savings Bank Salem | $8.82 billion |
| Needham Bank Needham | $7.42 billion |
| Cambridge Savings Bank Cambridge | $6.98 billion |
| Middlesex Savings Bank Natick | $6.15 billion |
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