Lists · Deposits by county
Suffolk County, NY Bank Deposit Market Share
JPMorgan Chase Bank, N.A. holds the largest share of deposits in Suffolk County, NY, 26.2%, followed by Capital One, N.A. (10.6%) and Dime Commercial Bank (9.9%). 22 institutions hold $64.92B at 306 offices as of June 30, 2026, up 3.4% from 2025.
Largest share changes since 2025
Gained: OceanFirst Bank, N.A. (1.31 points, new to this market); Flagstar Bank, N.A. (0.83 points); Capital One, N.A. (0.63 points).
Lost: JPMorgan Chase Bank, N.A. (-0.54 points); Bank of America, N.A. (-0.49 points); TD Bank, N.A. (-0.39 points).
| # | Institution | Deposits | Market share | Share change from 2025 |
|---|---|---|---|---|
| 1 | JPMorgan Chase Bank, N.A. | $17.01B | 26.20% | -0.54 pts |
| 2 | Capital One, N.A. | $6.85B | 10.56% | +0.63 pts |
| 3 | Dime Commercial Bank | $6.41B | 9.87% | -0.23 pts |
| 4 | TD Bank, N.A. | $5.86B | 9.02% | -0.39 pts |
| 5 | Bank of America, N.A. | $5.81B | 8.95% | -0.49 pts |
| 6 | Citibank, N.A. | $4.54B | 6.99% | -0.26 pts |
| 7 | Flagstar Bank, N.A. | $4.19B | 6.46% | +0.83 pts |
| 8 | Manufacturers and Traders Trust Company | $3.25B | 5.00% | -0.32 pts |
| 9 | BankUnited, N.A. | $2.18B | 3.36% | -0.02 pts |
| 10 | Webster Bank, N.A. | $1.94B | 2.99% | -0.12 pts |
| 11 | Apple Bank | $1.50B | 2.31% | +0.02 pts |
| 12 | ConnectOne Bank | $1.34B | 2.06% | -0.20 pts |
| 13 | Wells Fargo Bank, N.A. | $1.02B | 1.57% | +0.35 pts |
| 14 | Citizens Bank, N.A. | $947.9M | 1.46% | +0.36 pts |
| 15 | OceanFirst Bank, N.A. | $848.6M | 1.31% | +1.31 pts |
| 16 | Valley National Bank | $608.6M | 0.94% | +0.11 pts |
| 17 | Ridgewood Savings Bank | $200.8M | 0.31% | 0.00 pts |
| 18 | Hanover Community Bank | $140.4M | 0.22% | +0.04 pts |
| 19 | City National Bank | $113.0M | 0.17% | -0.05 pts |
| 20 | First Central Savings Bank | $78.8M | 0.12% | +0.02 pts |
| 21 | American Community Bank | $47.6M | 0.07% | +0.01 pts |
| 22 | Santander Bank, N.A. | $44.7M | 0.07% | -0.01 pts |
About this list
Deposits are those held at each institution's offices in Suffolk County as of June 30, 2026, from the FDIC Summary of Deposits, whatever state the institution is headquartered in. Market share is the institution's deposits divided by all deposits in the market. Shares are by bank charter, not rolled up to the holding company, and cover FDIC-insured institutions only, so credit unions are not included. Each office is placed in its county and metro area by the FDIC branch directory; the few offices the directory does not list are left out of the market and of every share.
Share change compares the institution's share in 2025 and 2026 in percentage points. Deposit change compares its deposits here in the two years and includes deposits that moved through mergers and branch sales; "New" means it had no offices here a year earlier. Offices that closed during the year are placed by their ZIP code or city.
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