FDIC-insured bank
Main Street Bank
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 |
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 |