| Institution | Branch | City | County | Deposits at last filing |
|---|---|---|---|---|
| Bankwell BankBank · $3.47B | Elm Street Branch | New Canaan, CT | Western Connecticut | $469.1M |
| JPMorgan Chase Bank, National AssociationBank · $4.09T | Shops At Stonebridge Branch | Cheshire, CT | Naugatuck Valley | $3.4M |
| Manufacturers and Traders Trust CompanyBank · $218.79B | Honey Locust Branch | Bridgeport, CT | Greater Bridgeport | $671K |
| PeoplesBankBank · $4.62B | Hartford Branch | Hartford, CT | Capitol | $250K |
| Alden Credit UnionCredit union · $185.4M | COCC Co-Location Site | Avon, CT | Capitol | n/a |
| Bridgeport Post Office Federal Credit UnionCredit union · $3.4M | BPOFCU | Bridgeport, CT | Greater Bridgeport | n/a |
| Bridgeport Post Office Federal Credit UnionCredit union · $3.4M | BPOFCU | Bridgeport, CT | Greater Bridgeport | n/a |
| Coreplus Federal Credit Union |
| Pfizer |
| Groton, CT |
| Southeastern Connecticut |
| n/a |
| Coreplus Federal Credit UnionCredit union · $676.5M | Colver Ave | Groton, CT | Southeastern Connecticut | n/a |
| Coreplus Federal Credit UnionCredit union · $676.5M | New Haven | New Haven, CT | South Central Connecticut | n/a |
| Coreplus Federal Credit UnionCredit union · $676.5M | New London | New London, CT | Southeastern Connecticut | n/a |
| Ever $ Green Federal Credit UnionCredit union · $72.6M | COCC | Southington, CT | Capitol | n/a |
| Finex Credit UnionCredit union · $134.0M | Finex Administrative Office | East Hartford, CT | Capitol | n/a |
| Greater Waterbury Healthcare Federal Credit UnionCredit union · $9.3M | Iron Mountain | Watertown, CT | Naugatuck Valley | n/a |
| Greater Waterbury Healthcare Federal Credit UnionCredit union · $9.3M | FD Community Federal Credit Union | Watertown, CT | Naugatuck Valley | n/a |
| Meriden Postal Employees Federal Credit UnionCredit union · $343K | John Ginty,Supervisory Committee | Meriden, CT | South Central Connecticut | n/a |
| Mutual Security Credit UnionCredit union · $385.4M | BRIDGEPORT BRANCH | Bridgeport, CT | Greater Bridgeport | n/a |
| Nutmeg State Financial Credit UnionCredit union · $916.5M | SCSU Student Center | New Haven, CT | South Central Connecticut | n/a |
| Nutmeg State Financial Credit UnionCredit union · $916.5M | Hamden | Hamden, CT | South Central Connecticut | n/a |
| Nutmeg State Financial Credit UnionCredit union · $916.5M | Branford | Branford, CT | South Central Connecticut | n/a |
| Nutmeg State Financial Credit UnionCredit union · $916.5M | 200 Orange St | New Haven, CT | South Central Connecticut | n/a |
| Self-Help Federal Credit UnionCredit union · $2.41B | Hartford-Franklin Ave | Hartford, CT | Capitol | n/a |
| Self-Help Federal Credit UnionCredit union · $2.41B | Hartford-Main St | Hartford, CT | Capitol | n/a |
| St. Mary's Credit UnionCredit union · $1.03B | COCC | Southington, CT | Capitol | n/a |
| United Business & Industry Federal Credit UnionCredit union · $141.4M | United Business & Industry FCU | Plainville, CT | Capitol | n/a |