Lists · Deposits by county
Plymouth County, MA Bank Deposit Market Share
Rockland Trust Company holds the largest share of deposits in Plymouth County, MA, 28.3%, followed by Eastern Bank (17.6%) and Hingham Institution for Savings (10.6%). 17 institutions hold $18.48B at 125 offices as of June 30, 2026, down 2.8% from 2025.
Largest share changes since 2025
Gained: Eastern Bank (8.83 points); Rockland Trust Company (1.18 points); Hingham Institution for Savings (0.59 points).
Lost: Mountainone Bank (-0.15 points); Coastal Heritage Bank (-0.10 points).
| # | Institution | Deposits | Market share | Share change from 2025 |
|---|---|---|---|---|
| 1 | Rockland Trust Company | $5.24B | 28.34% | +1.18 pts |
| 2 | Eastern Bank | $3.25B | 17.61% | +8.83 pts |
| 3 | Hingham Institution for Savings | $1.96B | 10.60% | +0.59 pts |
| 4 | Citizens Bank, N.A. | $1.74B | 9.41% | +0.51 pts |
| 5 | Bank of America, N.A. | $1.45B | 7.82% | +0.34 pts |
| 6 | Santander Bank, N.A. | $1.22B | 6.61% | +0.06 pts |
| 7 | North Easton Savings Bank | $777.5M | 4.21% | +0.54 pts |
| 8 | Bluestone Bank | $681.8M | 3.69% | +0.26 pts |
| 9 | South Shore Bank | $400.2M | 2.17% | +0.10 pts |
| 10 | Coastal Heritage Bank | $367.8M | 1.99% | -0.10 pts |
| 11 | TD Bank, N.A. | $360.8M | 1.95% | +0.03 pts |
| 12 | Cape Cod Five Cents Savings Bank | $241.8M | 1.31% | +0.11 pts |
| 13 | TruNorth Bank | $197.0M | 1.07% | +0.04 pts |
| 14 | Webster Bank, N.A. | $196.6M | 1.06% | -0.01 pts |
| 15 | JPMorgan Chase Bank, N.A. | $191.2M | 1.03% | +0.23 pts |
| 16 | Mountainone Bank | $149.8M | 0.81% | -0.15 pts |
| 17 | Mechanics Cooperative Bank | $59.9M | 0.32% | +0.03 pts |
About this list
Deposits are those held at each institution's offices in Plymouth 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.
Wider markets
Other counties in Massachusetts
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