Banks in Suffolk County, New York
309 active bank branches operated by 23 institutions, per FDIC records.
Active branches
309
Banks present
23
Deposits (2026)
$64.9B
Closings since 2020
96
25 openings
Largest banks by deposits in Suffolk County (2026)
| Bank | Deposits | Share | Branches |
|---|---|---|---|
| Chase Bank | $17.0B | 26.2% | 64 |
| Capital One | $6.9B | 10.6% | 14 |
| Dime Commercial Bank | $6.4B | 9.9% | 28 |
| TD Bank | $5.9B | 9% | 25 |
| Bank of America | $5.8B | 9% | 30 |
| Citibank | $4.5B | 7% | 18 |
| Flagstar Bank | $4.2B | 6.5% | 16 |
| M&T Bank | $3.2B | 5% | 36 |
| BankUnited | $2.2B | 3.4% | 1 |
| Santander Bank | $2.0B | 3.1% | 15 |
Deposit location reflects the office to which deposits are reported and may not represent the residence of depositors.
Cities and towns
- Melville (17)
- Hauppauge (13)
- Commack (12)
- Bay Shore (10)
- Huntington (10)
- Huntington Station (9)
- Riverhead (8)
- Smithtown (8)
- Patchogue (8)
- East Hampton (7)
- Farmingdale (7)
- Shirley (7)
- Southampton (7)
- Lindenhurst (6)
- Northport (6)
- Bohemia (6)
- Hampton Bays (6)
- Deer Park (6)
- West Babylon (6)
- Sag Harbor (5)
- Lake Grove (5)
- Holbrook (5)
- Port Jefferson Station (5)
- Rocky Point (5)
- Westhampton Beach (5)
- Port Jefferson (5)
- Ronkonkoma (5)
- Islandia (5)
- North Babylon (4)
- East Setauket (4)
- East Northport (4)
- Medford (4)
- Babylon (4)
- Greenport (4)
- East Islip (4)
- Farmingville (3)
- Kings Park (3)
- West Islip (3)
- Southold (3)
- Mattituck (3)
- Montauk (3)
- Lake Ronkonkoma (3)
- Amityville (3)
- Brentwood (3)
- Selden (3)
- Centereach (2)
- Central Islip (2)
- Copiague (2)
- Islip (2)
- Center Moriches (2)
- Wading River (2)
- Shelter Island (2)
- Bayport (2)
- Yaphank (2)
- Miller Place (2)
- Greenlawn (2)
- Saint James (2)
- Bridgehampton (2)
- Sayville (2)
- Wyandanch (2)
- Setauket (1)
- Mount Sinai (1)
- East Farmingdale (1)
- Speonk (1)
- Cutchogue (1)
- Shoreham (1)
- Bellport (1)
- Huntington Township (1)
- North Lindenhurst (1)
- Smithtown Township (1)
- Fort Salonga (1)
- Ridge (1)
- Stony Brook (1)
- Coram (1)
- Nesconset (1)
- Oakdale (1)
- East Moriches (1)
Transcribed from FDIC BankFind Suite active-location records and the annual Summary of Deposits. County assignment follows the FDIC branch record.