Branch Network
CNB St. Louis Bank Locations & Branches Maplewood, Missouri
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CNB St. Louis Bank operates 6 branches from its headquarters in Maplewood, MO, .
CNB St. Louis Bank branch network
All 6 branches are in MISSOURI, across 6 cities. Its largest office by deposits is the Cnb St Louis Bank office in Maplewood, MO, with $373.5M (53.6% of its branch deposits). It had the same number of branches on June 30, 2025.
CNB St. Louis Bank at a glance
It reports no CET1 ratio; its Tier 1 leverage ratio was 9.29% at Q2 2026, above the 9% community bank leverage ratio requirement for being considered well capitalized.
- Total assets, Q2 2026
- $812.9M
- Tier 1 leverage ratio, Q2 2026
- 9.29%
- Deposit insurance
- FDIC
- Regulator
- FDIC
- Latest call report
- Q2 2026, FFIEC 051
- Established
- 1915
Full financial profile · Is CNB St. Louis Bank safe? · CNB St. Louis Bank call report · Routing number
Deposit market share
Share of all FDIC-insured deposits held in each area, from the June 30, 2026 Summary of Deposits. Rank 1 is the largest holder. Shares are by bank charter, not by holding company.
| Area | Rank | Deposit share | Deposits |
|---|---|---|---|
| City: Maplewood, MO (1 branch) | 1 of 1 | 100.0% | $373.5M |
| State: MO (6 branches) | 61 of 249 | 0.2% | $696.8M |
Ranked by total assets among banks headquartered in the state: Largest banks in Missouri.
Share by county and metro area
CNB St. Louis Bank's share of FDIC-insured deposits in the counties and metro areas where it has branches, from the June 30, 2026 Summary of Deposits. Up to the ten largest of each are shown, by the bank's deposits. Rank 1 is the largest holder. Banks only: credit unions are not in the Summary of Deposits.
Counties
| County | Rank | Deposit share | Deposits | County total |
|---|---|---|---|---|
| St. Louis, MO (4 branches) | 21 of 55 | 1.2% | $599.6M | $48.49B |
| St. Charles, MO (2 branches) | 27 of 35 | 1.0% | $97.2M | $9.96B |
Metro areas
| Metro area | Rank | Deposit share | Deposits | Metro total |
|---|---|---|---|---|
| St. Louis, MO-IL (6 branches) | 38 of 111 | 0.5% | $696.8M | $141.72B |
| Branch | Location | ZIP | Deposits |
|---|---|---|---|
| Cnb St Louis Bank | Maplewood, MO | 63143 | $373.5M |
| Florissant Banking Center Branch | Florissant, MO | 63031 | $101.5M |
| Westport Banking Center Branch | Maryland Heights, MO | 63043 | $63.4M |
| Affton Banking Center Branch | Affton, MO | 63123 | $61.3M |
| St. Peters Branch | St. Peters, MO | 63376 | $50.6M |
| St. Charles Branch | Saint Charles, MO | 63303 | $46.6M |
Source: FDIC Summary of Deposits, June 30, 2026. How the survey works.
Regulator records: FDIC BankFind (cert 4549) · FFIEC NIC profile (RSSD 870650)