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Pioneer Bank Locations & Branches Sergeant Bluff, Iowa
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Pioneer Bank operates 4 branches from its headquarters in Sergeant Bluff, IA, .
Pioneer Bank branch network
Its 4 branches span 2 states and 3 cities. The most are in IOWA (3) and SOUTH DAKOTA (1). IOWA holds 78.8% of its branch deposits. Sioux City, IA has the most of its branches, 2. Its largest office by deposits is its main office in Sergeant Bluff, IA, with $115.6M (47.6% of its branch deposits). It had the same number of branches on June 30, 2025.
Pioneer Bank at a glance
It reports no CET1 ratio; its Tier 1 leverage ratio was 10.56% at Q2 2026, above the 9% community bank leverage ratio requirement for being considered well capitalized.
- Total assets, Q2 2026
- $282.8M
- Tier 1 leverage ratio, Q2 2026
- 10.56%
- Deposit insurance
- FDIC
- Regulator
- FDIC
- Latest call report
- Q2 2026, FFIEC 041
- Established
- 1907
Full financial profile · Is Pioneer Bank safe? · Pioneer 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: Sergeant Bluff, IA (1 branch) | 1 of 2 | 80.7% | $115.6M |
| State: IA (3 branches) | 140 of 261 | 0.1% | $191.4M |
Ranked by total assets among banks headquartered in the state: Largest banks in Iowa.
Share by county and metro area
Pioneer 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 |
|---|---|---|---|---|
| Woodbury, IA (3 branches) | 7 of 20 | 5.6% | $191.4M | $3.45B |
| Union, SD (1 branch) | 6 of 9 | 6.7% | $51.6M | $773.2M |
Metro areas
| Metro area | Rank | Deposit share | Deposits | Metro total |
|---|---|---|---|---|
| Sioux City, IA-NE-SD (4 branches) | 7 of 30 | 5.1% | $243.0M | $4.77B |
| Branch | Location | ZIP | Deposits |
|---|---|---|---|
| Pioneer Bank (main office) | Sergeant Bluff, IA | 51054 | $115.6M |
| Singing Hills Branch | Sioux City, IA | 51106 | $60.1M |
| Dunes Branch | Dakota Dunes, SD | 57049 | $51.6M |
| Sioux City Branch | Sioux City, IA | 51101 | $15.7M |
Source: FDIC Summary of Deposits, June 30, 2026. How the survey works.
Regulator records: FDIC BankFind (cert 19540) · FFIEC NIC profile (RSSD 300942)