Main Street Bank

Headquartered in Marlborough, MA. Part of Main Street Group Bancshares Mhc. FDIC certificate #90235 · Federal Reserve RSSD 818401.

Total assets

$1.6B

Deposits

$1.3B

Q1 2026

Active branches

Closings since Jan 2020

0 openings since Jan 2020

All locations →Quarterly financials →

Financial snapshot — Q1 2026

All quarters →

Net income (quarter)

$2M

Return on assets

0.53%

Return on equity

4.86%

Noncurrent loan rate

1.66%

Deposits by year (Summary of Deposits)

2019

2020

2021

2022

2023

2024

2025

Values in $ billions, June 30 of each year.

Closings by year

2020

2021

2024

Branches by state

Massachusetts 6

Recent closings

Main Street Bank — Littleton, MAbank exits city
220 GREAT RD · closed October 4, 2024
Main Street Bank — Lunenburg, MAbank exits cityno other active branch recorded in city
947 MASSACHUSETTS AVE · closed October 4, 2024
Main Street Bank — Marlborough, MA
71 BOSTON POST RD E · closed October 4, 2024
Main Street Bank — Sudbury, MAbank exits city
439 BOSTON POST ROAD · closed October 4, 2024
Main Street Bank — Groton, MAbank exits city
489 MAIN STREET · closed October 30, 2021
Main Street Bank — Shirley, MAbank exits city
95 FRONT STREET · closed October 30, 2021
Main Street Bank — Westborough, MAbank exits city
21 EAST MAIN STREET · closed September 19, 2020

All figures transcribed from FDIC BankFind Suite records: structure-change history, quarterly financial reports and the annual Summary of Deposits · bank site: www.bankmainstreet.com.