Lists · Deposits by county
Suffolk County, MA Bank Deposit Market Share
State Street Bank and Trust Company holds the largest share of deposits in Suffolk County, MA, 63.4%, followed by Bank of America, N.A. (16.4%) and Citizens Bank, N.A. (10.3%). 35 institutions hold $381.68B at 198 offices as of June 30, 2026, up 10.6% from 2025.
Largest share changes since 2025
Gained: State Street Bank and Trust Company (3.22 points); Beacon Bank & Trust (0.97 points); Eastern Bank (0.19 points).
Lost: Bank of America, N.A. (-1.85 points); Santander Bank, N.A. (-1.12 points); Citizens Bank, N.A. (-0.97 points).
| # | Institution | Deposits | Market share | Share change from 2025 |
|---|---|---|---|---|
| 1 | State Street Bank and Trust Company | $242.09B | 63.43% | +3.22 pts |
| 2 | Bank of America, N.A. | $62.61B | 16.40% | -1.85 pts |
| 3 | Citizens Bank, N.A. | $39.47B | 10.34% | -0.97 pts |
| 4 | Santander Bank, N.A. | $12.75B | 3.34% | -1.12 pts |
| 5 | Eastern Bank | $9.37B | 2.46% | +0.19 pts |
| 6 | Beacon Bank & Trust | $4.24B | 1.11% | +0.97 pts |
| 7 | TD Bank, N.A. | $2.97B | 0.78% | -0.01 pts |
| 8 | Rockland Trust Company | $2.23B | 0.58% | -0.06 pts |
| 9 | JPMorgan Chase Bank, N.A. | $1.40B | 0.37% | +0.03 pts |
| 10 | Webster Bank, N.A. | $794.1M | 0.21% | +0.00 pts |
| 11 | East West Bank | $771.7M | 0.20% | +0.01 pts |
| 12 | First-Citizens Bank & Trust Company | $607.0M | 0.16% | -0.02 pts |
| 13 | The Cooperative Bank | $457.8M | 0.12% | -0.01 pts |
| 14 | Safra National Bank of New York | $210.5M | 0.06% | +0.01 pts |
| 15 | PNC Bank, N.A. | $201.0M | 0.05% | 0.00 pts |
| 16 | Manufacturers and Traders Trust Company | $184.1M | 0.05% | -0.01 pts |
| 17 | First American Trust, FSB | $167.9M | 0.04% | +0.03 pts |
| 18 | Leader Bank, N.A. | $166.3M | 0.04% | +0.01 pts |
| 19 | The Northern Trust Company | $148.1M | 0.04% | 0.00 pts |
| 20 | Commonwealth Cooperative Bank | $140.6M | 0.04% | 0.00 pts |
| 21 | Eagle Bank | $112.5M | 0.03% | 0.00 pts |
| 22 | Hingham Institution for Savings | $112.2M | 0.03% | -0.01 pts |
| 23 | Cathay Bank | $109.5M | 0.03% | +0.00 pts |
| 24 | East Cambridge Savings Bank | $94.6M | 0.02% | 0.00 pts |
| 25 | Dedham Institution for Savings | $94.4M | 0.02% | +0.01 pts |
| 26 | Salem Five Cents Savings Bank | $77.5M | 0.02% | 0.00 pts |
| 27 | Cambridge Savings Bank | $43.1M | 0.01% | 0.00 pts |
| 28 | Needham Bank | $41.1M | 0.01% | 0.00 pts |
| 29 | Oneunited Bank | $19.3M | <0.01% | 0.00 pts |
| 30 | Wilmington Trust, N.A. | $0 | <0.01% | 0.00 pts |
| 30 | The Bank of New York Mellon | $0 | <0.01% | 0.00 pts |
| 30 | Wells Fargo Bank, N.A. | $0 | <0.01% | 0.00 pts |
| 30 | CIBC National Trust Company | $0 | <0.01% | 0.00 pts |
| 30 | BNY Mellon, N.A. | $0 | <0.01% | 0.00 pts |
| 30 | Goldman Sachs Bank USA | $0 | <0.01% | 0.00 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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