County banking markets / MA / 25023
PlymouthMassachusetts
FIPS 25023. Branch offices reported to the FDIC Summary of Deposits, June 30 of each survey year, 1994–2025. One of 14 counties in Massachusetts’s 2025 survey.
Concentration, 1994–2025
Branch-count HHI squares each institution’s share of the county’s branch offices; deposit HHI squares its share of county deposits. The bands are the 2010 Horizontal Merger Guidelines classification, the dashed line the 1,800 level above which the Federal Reserve reviews a merger centrally. In 2025 this market is unconcentrated on branches (931) and unconcentrated on deposits (1,289).
Source: FDIC Summary of Deposits | DOJ & FTC, Horizontal Merger Guidelines (2010), section 5.3 | Federal Reserve, Competitive Effects of Mergers and Acquisitions FAQs Both indices computed from the SOD branch rows for this county, June 30 of each survey year. Neither is the Fed's screen HHI: no thrift weighting, no exclusion of specialty and internet banks, no central-booking adjustment. Methodology
Branches and institutions
140 branch offices and 30 institutions in 1994; 132 and 18 in 2025. Deposits booked in the county went from $3.43B to $19.17B, nominal.
Source: FDIC Summary of Deposits FDIC Summary of Deposits, June 30 of each survey year, 1994-2025. Methodology
Who holds the deposits, 2025
Every institution with a branch in the county, ranked by deposits booked here. Both shares are shown because they are the two indices above: squaring and summing the deposit column gives the deposit HHI, the branch column the branch-count HHI.
| # | Institution | Deposits | Deposit share | Branches | Branch share |
|---|---|---|---|---|---|
| 1 | Rockland Trust Company cert 9712 | $5.17B | 26.94% | 28 | 21.21% |
| 2 | HarborOne Bank cert 59070 | $2.40B | 12.51% | 8 | 6.06% |
| 3 | Hingham Institution for Savings cert 90211 | $1.90B | 9.93% | 5 | 3.79% |
| 4 | Eastern Bank cert 32773 | $1.82B | 9.48% | 13 | 9.85% |
| 5 | Citizens Bank, National Association cert 57957 | $1.69B | 8.83% | 12 | 9.09% |
| 6 | Bank of America, National Association cert 3510 | $1.42B | 7.43% | 8 | 6.06% |
| 7 | Santander Bank, N.A. cert 29950 | $1.25B | 6.50% | 10 | 7.58% |
| 8 | North Easton Savings Bank cert 90259 | $696.9M | 3.64% | 9 | 6.82% |
| 9 | Bluestone Bank cert 90169 | $652.5M | 3.40% | 7 | 5.30% |
| 10 | Coastal Heritage Bank cert 26591 | $398.4M | 2.08% | 7 | 5.30% |
| 11 | South Shore Bank cert 90303 | $392.3M | 2.05% | 5 | 3.79% |
| 12 | TD Bank, National Association cert 18409 | $364.7M | 1.90% | 4 | 3.03% |
| 13 | The Cape Cod Five Cents Savings Bank cert 23287 | $227.3M | 1.19% | 3 | 2.27% |
| 14 | Webster Bank, National Association cert 18221 | $203.3M | 1.06% | 3 | 2.27% |
| 15 | North Shore Bank, a Co-operative Bank cert 26484 | $194.9M | 1.02% | 2 | 1.52% |
| 16 | MountainOne Bank cert 90253 | $182.8M | 0.95% | 2 | 1.52% |
| 17 | JPMorgan Chase Bank, National Association cert 628 | $153.7M | 0.80% | 5 | 3.79% |
| 18 | Mechanics Cooperative Bank cert 26634 | $55.3M | 0.29% | 1 | 0.76% |
Source: FDIC Summary of Deposits June 30, 2025. Branch rows grouped by FDIC certificate; names as reported to the survey. Deposit share is n/a where the county's total SOD deposits are zero. Methodology
Back to county banking markets, up to Massachusetts, or read the methodology for the two HHI constructions and what they cannot tell you.