Mahaska County, Iowa, a core county of the Des Moines-West Des Moines-Ames, IA market, holds $589M in deposits across 7 insured institutions and 8 branches. Nicolet National Bank is the largest deposit holder at 36.7% share. The top three banks hold 76% of deposits, which places the county in the Concentrated band. Deposits have grown 0.9% since 2021 while the branch count fell by 20.0%. It produced $874M of real gross domestic product in 2024, ranking #1,231 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: 10 in 2021 to 8 in 2026. Institutions: 7 to 7. Top-three share: 78% to 76%.
Institutions by deposits
| Institution | Deposits | Share | 5‑yr deposits |
|---|---|---|---|
| Nicolet National Bank | $216M | 36.7% | -14% |
| Bank Iowa | $158M | 26.9% | +24% |
| TruBank | $71M | 12.1% | -10% |
| Twin Cedars Bank | $44M | 7.5% | +153% |
| Great Southern Bank | $36M | 6.2% | -44% |
| First State Bank | $33M | 5.5% | +141% |
| Leighton State Bank | $30M | 5.2% | -1% |
The 7 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 Des Moines-West Des Moines-Ames market
Mahaska County is one of 10 counties that make up the Des Moines-West Des Moines-Ames, IA market, a Combined Statistical Area (ranked #53 of 293 U.S. markets by economic output). It produces 1.2% of the market’s output and holds 1.3% of its deposits.
| Measure | Mahaska County | Share of parent market |
|---|---|---|
| 2024 GDP | $874M | 1.2% |
| Deposits | $589M | 1.3% |
| Population | 21,880 | 2.3% |
View the full Des Moines-West Des Moines-Ames market profile →
Recruiting in Mahaska County
Deposits are held closely by the largest banks, which often means the bankers worth recruiting are inside a small 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 Mahaska County.
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