Why Hike to the Bank? Open Your Account Online.
Open an account online for personal checking, savings and CDs.
A New Partnership
The Parent Companies of MountainOne Bank and Mechanics Cooperative Bank have entered into an agreement to merge into a combined Mutual Holding Company.
First-time Homebuyer Program
Are you a first-time homebuyer? We have the perfect thing: MountainOne’s $650 First-Time Homebuyer Credit! Ask one of our mortgage lenders for details today!
We've Got You Covered
Have you herd? MountainOne is a strong and stable financial institution, and well positioned for today’s economic environment. As a DIF Member Bank, Opens in new taball deposits with MountainOne are fully insured in excess of existing FDIC coverage. Questions? Don’t fret! Our Mountaineers are here to help. It’s in our nature!
Meet Mo
When it comes to spokesgoats, he’s the G.O.A.T. Mo is a reminder that at MountainOne, banking isn’t just on our minds; it’s in our nature.
Community
MountainOne is proud to be a part of our local communities since 1848. We offer a variety of resources including our Community Dividend Program, financial education outreach and employee volunteer services.
Careers
MountainOne is dedicated to the local communities we serve, with a mission of delivering solutions of real value that help individuals, businesses, and community institutions manage their financial lives with clarity and confidence.
Security
We’d move mountains to protect your accounts. That’s why MountainOne invests in enhanced fraud monitoring tools that can help detect unwanted account activity hopefully before it’s too late.
Open a Deposit Account
Open a personal checking account, savings account, money market account, or Certificate of Deposit (CD) online now!
Recent Updates
MountainOne is proud to share that it has been named one of the Boston Business Journal’s 2025 Best Places to Work in the Medium Business Category (100-249 employees). Each year,...
An all-female team of Mountaineers from MountainOne rolled up their sleeves to support Women Build, a volunteer initiative led by Central Berkshire Habitat for Humanity. The program empowers women to...