Every FDIC-insured bank branch in Suffolk County, New York as of June 30, 2025. County land area: 911 square miles, 33.5 branches per 100 sq mi.
| Institution | Branches | Deposits |
|---|---|---|
| JPMorgan Chase Bank, National Association | 64 | $16.80B |
| Manufacturers and Traders Trust Company | 36 | $3.34B |
| Bank of America, National Association | 29 | $5.93B |
| Dime Community Bank | 28 | $6.34B |
| TD Bank, National Association | 27 | $5.91B |
| ConnectOne Bank | 18 | $1.42B |
| Citibank, National Association | 18 | $4.55B |
| Flagstar Bank, National Association | 16 | $3.53B |
| Capital One, National Association | 15 | $6.23B |
| Webster Bank, National Association | 14 | $1.95B |
| Apple Bank | 10 | $1.44B |
| Citizens Bank, National Association | 8 | $692.2M |
| Flushing Bank | 5 | $652.6M |
| Valley National Bank | 4 | $517.5M |
| Ridgewood Savings Bank | 3 | $194.5M |
| Wells Fargo Bank, National Association | 3 | $767.5M |
| Hanover Community Bank | 2 | $113.6M |
| City National Bank | 1 | $139.7M |
| Santander Bank, N.A. | 1 | $47.7M |
| First Central Savings Bank | 1 | $63.3M |
| American Community Bank | 1 | $40.5M |
| BankUnited, National Association | 1 | $2.13B |