Sumner County, Kansas, a county in the Wichita-Arkansas City-Winfield, KS market, holds $640M in deposits across 10 insured institutions and 14 branches. Impact Bank is the largest deposit holder at 21.8% share. The top three banks hold 54% of deposits, which places the county in the Moderate band. Deposits have grown 21.7% since 2020 while the branch count fell by 6.7%. It produces $671M of output, ranking #1,294 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: 15 in 2020 to 14 in 2025. Institutions: 10 to 10. Top-three share: 50% to 54%.
Institutions by deposits
| Institution | Deposits | Share | 5‑yr deposits |
|---|---|---|---|
| Impact Bank | $140M | 21.8% | +14% |
| Carson Bank | $123M | 19.3% | +73% |
| The Valley State Bank | $81M | 12.7% | +15% |
| The Stock Exchange Bank, Caldwell, Kansas | $62M | 9.7% | +30% |
| Bank of Commerce and Trust Company | $59M | 9.2% | +4% |
| Conway Bank | $52M | 8.1% | +11% |
| The Security State Bank | $44M | 6.9% | -1% |
| Vintage Bank Kansas | $40M | 6.3% | +25% |
| RCB Bank | $33M | 5.1% | +15% |
| Bank of Commerce | $6M | 0.9% | no 2020 presence |
The 10 insured institutions with a branch presence in this county, per the FDIC Summary of Deposits, June 30, 2025. Five-year change compares the same institution’s county deposits in 2020 and 2025. 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 2020 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 Wichita-Arkansas City-Winfield market
Sumner County is one of 5 counties that make up the Wichita-Arkansas City-Winfield, KS market, a Combined Statistical Area (ranked #83 of 293 U.S. markets by economic output). It produces 1.7% of the market’s output and holds 2.8% of its deposits.
| Measure | Sumner County | Share of parent market |
|---|---|---|
| 2024 GDP | $671M | 1.7% |
| Deposits | $640M | 2.8% |
| Population | 22,312 | 3.2% |
View the full Wichita-Arkansas City-Winfield market profile →
Recruiting in Sumner County
Deposits are split among a moderate number of institutions. 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 Sumner County.
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