Branch Network
American State Bank Locations & Branches Osceola, Iowa
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American State Bank operates 4 branches from its headquarters in Osceola, IA, .
American State Bank branch network
All 4 branches are in IOWA, across 3 cities. Osceola, IA has the most of its branches, 2. Its largest office by deposits is its main office in Osceola, IA, with $173.0M (61.2% of its branch deposits). It had the same number of branches on June 30, 2025.
American State Bank at a glance
It reports no CET1 ratio; its Tier 1 leverage ratio was 11.11% at Q2 2026, above the 9% community bank leverage ratio requirement for being considered well capitalized.
- Total assets, Q2 2026
- $360.8M
- Tier 1 leverage ratio, Q2 2026
- 11.11%
- Deposit insurance
- FDIC
- Regulator
- Federal Reserve
- Established
- 1987
Full financial profile · Is American State Bank 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: Osceola, IA (2 branches) | 1 of 3 | 55.4% | $173.0M |
| State: IA (4 branches) | 103 of 261 | 0.2% | $282.8M |
Ranked by total assets among banks headquartered in the state: Largest banks in Iowa.
Share by county and metro area
American State 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 |
|---|---|---|---|---|
| Clarke, IA (2 branches) | 1 of 3 | 55.4% | $173.0M | $312.1M |
| Decatur, IA (1 branch) | 1 of 5 | 32.3% | $64.0M | $198.2M |
| Madison, IA (1 branch) | 4 of 4 | 9.8% | $45.8M | $465.8M |
Metro areas
| Metro area | Rank | Deposit share | Deposits | Metro total |
|---|---|---|---|---|
| Des Moines-West Des Moines, IA (1 branch) | 47 of 57 | 0.1% | $45.8M | $37.99B |
| Branch | Location | ZIP | Deposits |
|---|---|---|---|
| American State Bank (main office) | Osceola, IA | 50213 | $173.0M |
| Lamoni Branch | Lamoni, IA | 50140 | $64.0M |
| South John Wayne Drive Branch | Winterset, IA | 50273 | $45.8M |
| Osceola Branch | Osceola, IA | 50213 | $0 |
Source: FDIC Summary of Deposits, June 30, 2026. How the survey works.
Regulator records: FDIC BankFind (cert 26944) · FFIEC NIC profile (RSSD 276645)