Banks in Suffolk County, MA

36 FDIC-insured banks operate 199 branches in Suffolk County, Massachusetts, holding $381.17B in total deposits as of the 2026 FDIC Summary of Deposits. State Street Bank and Trust Company leads the market with 63.5% share. Deposit market share is the clearest available measure of competitive position in a local market: it reflects where households and businesses actually keep their money, rather than where institutions advertise or how many branches they operate.

Suffolk County market profile

Understanding a deposit market requires knowing the market itself. These figures come from the US Census Bureau American Community Survey 2024 five-year estimates. Median family income is the measure federal regulators use to define low- and moderate-income thresholds under the Community Reinvestment Act, which is why it is reported here separately from household income.

Population	785,121
Median family income	$112,072
Median home value	$705,800
Banks operating in county	36
Bank branches	199

Deposit market share in Suffolk County

Ranked by deposits held within county borders. A bank's county deposits are the sum across all of its branches in that county, so an institution with several locations appears once. Figures are as of June 30, 2026, the annual reporting date for the FDIC Summary of Deposits.

Rank	Bank	Deposits	Share	Branches
1	State Street Bank and Trust Company	$242.09B	63.51%	1
2	Bank of America, National Association	$62.61B	16.43%	26
3	Citizens Bank, National Association	$38.93B	10.21%	36
4	Santander Bank, N.A.	$12.75B	3.34%	18
5	Eastern Bank	$9.37B	2.46%	14
6	Beacon Bank and Trust	$4.24B	1.11%	7
7	TD Bank, National Association	$2.97B	0.78%	14
8	Rockland Trust Company	$2.23B	0.58%	20
9	JPMorgan Chase Bank, National Association	$1.40B	0.37%	19
10	Webster Bank, National Association	$827.3M	0.22%	2
11	East West Bank	$771.7M	0.20%	1
12	First-Citizens Bank & Trust Company	$607.0M	0.16%	2
13	The Cooperative Bank	$457.8M	0.12%	4
14	Safra National Bank of New York	$210.5M	0.06%	1
15	PNC Bank, National Association	$201.0M	0.05%	3
16	Manufacturers and Traders Trust Company	$184.1M	0.05%	7
17	First American Trust, FSB	$167.9M	0.04%	1
18	Leader Bank, National Association	$166.3M	0.04%	1
19	The Northern Trust Company	$148.1M	0.04%	1
20	Commonwealth Co-operative Bank	$140.6M	0.04%	2
21	Eagle Bank	$112.5M	0.03%	1
22	Hingham Institution for Savings	$112.2M	0.03%	1
23	Cathay Bank	$109.5M	0.03%	1
24	East Cambridge Savings Bank	$94.6M	0.02%	1
25	Dedham Institution for Savings	$94.4M	0.02%	1
26	Salem Five Cents Savings Bank	$77.5M	0.02%	1
27	Cambridge Savings Bank	$43.1M	0.01%	2
28	Needham Bank	$41.1M	0.01%	2
29	OneUnited Bank	$19.3M	0.01%	2
30	Happen Bank, National Association	—	0.00%	1
31	Goldman Sachs Bank USA	—	0.00%	1
32	Wilmington Trust, National Association	—	0.00%	1
33	Wells Fargo Bank, National Association	—	0.00%	1
34	The Bank of New York Mellon	—	0.00%	1
35	BNY Mellon, National Association	—	0.00%	1
36	CIBC National Trust Company	—	0.00%	1

About this data

The FDIC Summary of Deposits is an annual survey of branch office deposits filed by every FDIC-insured institution as of June 30 each year. It is the authoritative source for local deposit market share and is the dataset regulators use when assessing competitive effects of bank mergers. Because it is annual, it reflects a point in time rather than current balances. Vault republishes it without modification, free to access and free to cite. Available to AI agents at vaultbot.ai/mcp.