Bank MountainOne Bank
MountainOne Bank is a federally insured bank based in North Adams, Massachusetts.
- Type
- Bank
- Charter
- State-chartered savings institution
- Primary regulator
- FDIC
- Established
- January 1, 1848
- Headquarters
- North Adams, MA
- FDIC certificate #
- 90253
- Fed RSSD ID
- 97804
- Holding company
- Mountainone Financial Mhc
- Website
- www.mountainone.com
Source: U.S. FDIC BankFind & NCUA 5300 Call Report (public data). Data sources · Data as of Q1 2026
Branches by state
MountainOne Bank operates 6 branch locations in Massachusetts. Select a state to drill down to its towns and individual branches.
Ownership
MountainOne Bank is owned by Mountainone Financial Mhc, which also owns 1 other institution. See the full ownership & merger history.
MountainOne Bank financial summary
Other banks in Massachusetts
Federally insured banks headquartered in Massachusetts, by total assets.
- State Street Bank and Trust Company $386.55B
- Eastern Bank $30.62B
- Rockland Trust Company $24.79B
- Beacon Bank and Trust $22.18B
- Salem Five Cents Savings Bank $8.57B
- Needham Bank $7.17B
- Cambridge Savings Bank $6.91B
- Middlesex Savings Bank $6.15B
Similar-size banks
Institutions close to MountainOne Bank’s $1.07B in assets.
- The First National Bank and Trust Co., Chickasha, Oklahoma $1.07B
- GNBank, National Association $1.07B
- Magyar Bank $1.07B
- The Federal Savings Bank $1.07B
- Generations Bank $1.07B
- Partners Bank of New England $1.07B
Also owned by Mountainone Financial Mhc
- Mechanics Cooperative Bank $878.9M