St. Louis County, Missouri, a core county of the St. Louis-St. Charles-Farmington, MO-IL market, holds $48.5B in deposits across 55 insured institutions and 303 branches. Commerce Bank is the largest deposit holder at 12.4% share. The top three banks hold 37% of deposits, which places the county in the Fragmented band. Deposits have fallen 1.2% since 2021 while the branch count fell by 3.5%. It produced $92.2B of real gross domestic product in 2024, ranking #52 of the 1,523 ranked counties by economic output.
Ranks show where the county stands among the 1,523 ranked counties (those within a Combined or Metropolitan Statistical Area that have a branch). They describe relative position, not a rating of market quality or suitability.
Deposit trend
Branches: 314 in 2021 to 303 in 2026. Institutions: 53 to 55. Top-three share: 38% to 37%.
Institutions by deposits
The 55 insured institutions with a branch presence in this county, per the FDIC Summary of Deposits, June 30, 2026. Five-year change compares the same institution’s county deposits in 2021 and 2026. Institutions are tracked by FDIC certificate number, and where an institution acquired another bank, the acquired bank’s prior deposits are folded into the baseline so the change reflects the combined, continuing franchise rather than reading as new. “No 2021 presence” means neither the institution nor a bank it later absorbed reported deposits in this county that year. Deposit figures are nominal and are not adjusted for inflation.
Part of the St. Louis-St. Charles-Farmington market
St. Louis County is one of 17 counties that make up the St. Louis-St. Charles-Farmington, MO-IL market, a Combined Statistical Area (ranked #27 of 293 U.S. markets by economic output). It produces 48.2% of the market’s output and holds 33.6% of its deposits.
| Measure | St. Louis County | Share of parent market |
|---|---|---|
| 2024 GDP | $92.2B | 48.2% |
| Deposits | $48.5B | 33.6% |
| Population | 990,911 | 34.0% |
View the full St. Louis-St. Charles-Farmington market profile →
Recruiting in St. Louis County
Deposits are spread across a competitive field of institutions, so the bankers worth recruiting are dispersed across more of them. Who holds the deposits, and how contested the market is, shapes both the runway for growth and the competition you would be recruiting against. We recruit commercial relationship managers, banking teams, and market leaders for banks building in markets like St. Louis County.
See how we help banks recruit commercial banking talent