Thomaston Savings Bank has successfully served our local community since being founded July 23, 1874. Our Main Office, located in Thomaston, CT, is central to our ten full-service branch offices, including our Commercial and Consumer Lending Offices. The Bank has always been a cornerstone in fulfilling the financial needs of our community. Through the dedication and charitable nature of our Bank and its Directors, Corporators, Officers, and employees we have made a difference in our community, with our volunteerism, donation of time, talents, and energy.. Banking Services. Online / Mobile Banking. Financial Planning. Mortgages.