1 FDIC-insured banks operate 1 branches in Fairfield County, Connecticut, holding — in total deposits as of the 2026 FDIC Summary of Deposits. Wilmington Trust, National Association leads the market with NaN% 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.
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 | Wilmington Trust, National Association | — | — | 1 |
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.