Suffolk County, New York, a core county of the New York-Newark, NY-NJ-CT-PA market, holds $62.8B in deposits across 22 insured institutions and 305 branches. JPMorgan Chase Bank, National Association is the largest deposit holder at 26.7% share. The top three banks hold 47% of deposits, which places the county in the Moderate band. Deposits have fallen 0.6% since 2020 while the branch count fell by 16.0%. It produces $108.2B of output, ranking #37 of the 1,523 ranked counties by economic output.
Ranks show where the county stands among the 1,523 ranked counties (those within a Combined or Metropolitan Statistical Area that have a branch). They describe relative position, not a rating of market quality or suitability.
Deposit trend
Branches: 363 in 2020 to 305 in 2025. Institutions: 24 to 22. Top-three share: 46% to 47%.
Institutions by deposits
| Institution | Deposits | Share | 5‑yr deposits |
|---|---|---|---|
| JPMorgan Chase Bank | $16.8B | 26.7% | +16% |
| Dime Community Bank | $6.3B | 10.1% | +56% |
| Capital One | $6.2B | 9.9% | -34% |
| Bank of America | $5.9B | 9.4% | +16% |
| TD Bank | $5.9B | 9.4% | +19% |
| Citibank | $4.6B | 7.2% | -2% |
| Flagstar Bank | $3.5B | 5.6% | -8% |
| Manufacturers and Traders Trust Company | $3.3B | 5.3% | -26% |
| BankUnited | $2.1B | 3.4% | -7% |
| Webster Bank | $2.0B | 3.1% | -4% |
| Apple Bank | $1.4B | 2.3% | 0% |
| ConnectOne Bank | $1.4B | 2.3% | +1,784% |
| Wells Fargo Bank | $768M | 1.2% | -3% |
| Citizens Bank | $692M | 1.1% | +83% |
| Flushing Bank | $653M | 1.0% | no 2020 presence |
| Valley National Bank | $517M | 0.8% | +20% |
| Ridgewood Savings Bank | $195M | 0.3% | +17% |
| City National Bank | $140M | 0.2% | +244% |
| Hanover Community Bank | $114M | 0.2% | no 2020 presence |
| First Central Savings Bank | $63M | 0.1% | no 2020 presence |
| Santander Bank | $48M | 0.1% | -75% |
| American Community Bank | $41M | 0.1% | +52% |
The 22 insured institutions with a branch presence in this county, per the FDIC Summary of Deposits, June 30, 2025. Five-year change compares the same institution’s county deposits in 2020 and 2025. Institutions are tracked by FDIC certificate number, and where an institution acquired another bank, the acquired bank’s prior deposits are folded into the baseline so the change reflects the combined, continuing franchise rather than reading as new. “No 2020 presence” means neither the institution nor a bank it later absorbed reported deposits in this county that year. Deposit figures are nominal and are not adjusted for inflation.
Part of the New York-Newark market
Suffolk County is one of 30 counties that make up the New York-Newark, NY-NJ-CT-PA market, a Combined Statistical Area (ranked #1 of 293 U.S. markets by economic output). It produces 5.1% of the market’s output and holds 2.2% of its deposits.
| Measure | Suffolk County | Share of parent market |
|---|---|---|
| 2024 GDP | $108.2B | 5.1% |
| Deposits | $62.8B | 2.2% |
| Population | 1,546,090 | 6.9% |
View the full New York-Newark market profile →
Recruiting in Suffolk County
Deposits are split among a moderate number of institutions. Who holds the deposits, and how contested the market is, shapes both the runway for growth and the competition you would be recruiting against. We recruit commercial relationship managers, banking teams, and market leaders for banks building in markets like Suffolk County.
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