Ledge Light Federal Credit Union
- Membership banking open to Pfizer Inc. employees. Locations in New London and Groton.
- http://www.ledgelightfcu.org/ledgelightfcu/

CorePlus Federal Credit Union, Inc.
- Membership banking for employees of public schools or private nursery schools in New London County. Banking locations in Norwich, Groton and East Lyme.
- http://www.coreplus.org/

Chelsea Groton Bank
- Mutual bank providing full line of financial services to individuals and businesses in the region. Branch locations throughout New London County.
- http://www.chelseagroton.com/