Branch Network
Bank Midwest Locations & Branches Spirit Lake, Iowa
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Bank Midwest operates 11 branches from its headquarters in Spirit Lake, IA, .
Bank Midwest branch network
Its 11 branches span 3 states and 11 cities. The most are in MINNESOTA (6), IOWA (4) and SOUTH DAKOTA (1). MINNESOTA holds 57.6% of its branch deposits. Its largest office by deposits is its main office in Spirit Lake, IA, with $312.9M (27.2% of its branch deposits). It had the same number of branches on June 30, 2025.
Bank Midwest at a glance
Its CET1 capital ratio was 11.95% at Q2 2026, above regulatory requirements.
- Total assets, Q2 2026
- $1.35B
- CET1 ratio, Q2 2026
- 11.95%
- Deposit insurance
- FDIC
- Regulator
- Federal Reserve
- Established
- 1887
Full financial profile · Is Bank Midwest safe? · 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: Spirit Lake, IA (1 branch) | 1 of 5 | 40.8% | $312.9M |
| State: IA (4 branches) | 67 of 261 | 0.3% | $427.6M |
| Largest deposit state: MN (6 branches) | 43 of 277 | 0.2% | $661.8M |
Ranked by total assets among banks headquartered in the state: Largest banks in Iowa.
Share by county and metro area
Bank Midwest'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 |
|---|---|---|---|---|
| Dickinson, IA (2 branches) | 2 of 8 | 23.4% | $312.9M | $1.34B |
| Cottonwood, MN (2 branches) | 1 of 5 | 49.8% | $223.3M | $448.0M |
| Martin, MN (2 branches) | 2 of 12 | 19.6% | $203.5M | $1.04B |
| Jackson, MN (1 branch) | 1 of 6 | 43.1% | $132.7M | $308.3M |
| Brown, MN (1 branch) | 4 of 10 | 10.5% | $102.2M | $972.1M |
| Minnehaha, SD (1 branch) | 20 of 25 | <0.1% | $60.4M | $478.92B |
| Sac, IA (1 branch) | 3 of 10 | 10.4% | $57.5M | $551.2M |
| Emmet, IA (1 branch) | 3 of 4 | 16.5% | $57.2M | $345.5M |
Metro areas
| Metro area | Rank | Deposit share | Deposits | Metro total |
|---|---|---|---|---|
| Spirit Lake, IA (2 branches) | 2 of 8 | 23.4% | $312.9M | $1.34B |
| Fairmont, MN (2 branches) | 2 of 12 | 19.6% | $203.5M | $1.04B |
| New Ulm, MN (1 branch) | 4 of 10 | 10.5% | $102.2M | $972.1M |
| Sioux Falls, SD (1 branch) | 30 of 39 | <0.1% | $60.4M | $1.13T |
| Branch | Location | ZIP | Deposits |
|---|---|---|---|
| Bank Midwest (main office) | Spirit Lake, IA | 51360 | $312.9M |
| Windom Branch | Windom, MN | 56101 | $179.4M |
| Fairmont Branch | Fairmont, MN | 56031 | $175.3M |
| Jackson Branch | Jackson, MN | 56143 | $132.7M |
| New Ulm Branch | New Ulm, MN | 56073 | $102.2M |
| Sioux Falls Branch | Sioux Falls, SD | 57104 | $60.4M |
| Wall Lake Branch | Wall Lake, IA | 51466 | $57.5M |
| Armstrong Branch | Armstrong, IA | 50514 | $57.2M |
| Westbrook Branch | Westbrook, MN | 56183 | $43.9M |
| Sherburn Branch | Sherburn, MN | 56171 | $28.2M |
| Okoboji Branch | Okoboji, IA | 51355 | $0 |
Source: FDIC Summary of Deposits, June 30, 2026. How the survey works.
Regulator records: FDIC BankFind (cert 5170) · FFIEC NIC profile (RSSD 45551)