Branch Network
Premier Bank Locations & Branches Rock Valley, Iowa
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Premier Bank operates 6 branches from its headquarters in Rock Valley, IA, .
Premier Bank branch network
Its 6 branches span 3 states and 6 cities. The most are in IOWA (3), SOUTH DAKOTA (2) and MINNESOTA (1). IOWA holds 65.0% of its branch deposits. Its largest office by deposits is its main office in Rock Valley, IA, with $316.1M (47.1% of its branch deposits). On June 30, 2025 it had 5 branches, 1 fewer than in 2026.
Premier Bank at a glance
It reports no CET1 ratio; its Tier 1 leverage ratio was 9.55% at Q2 2026, above the 9% community bank leverage ratio requirement for being considered well capitalized.
- Total assets, Q2 2026
- $826.5M
- Tier 1 leverage ratio, Q2 2026
- 9.55%
- Deposit insurance
- FDIC
- Regulator
- FDIC
- Established
- 1997
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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: Rock Valley, IA (1 branch) | 1 of 2 | 50.8% | $316.1M |
| State: IA (3 branches) | 65 of 261 | 0.3% | $436.5M |
Ranked by total assets among banks headquartered in the state: Largest banks in Iowa.
Share by county and metro area
Premier 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 |
|---|---|---|---|---|
| Sioux, IA (1 branch) | 4 of 9 | 10.8% | $316.1M | $2.93B |
| Union, SD (1 branch) | 2 of 9 | 19.8% | $152.8M | $773.2M |
| Lyon, IA (2 branches) | 3 of 6 | 15.9% | $120.4M | $758.6M |
| Nobles, MN (1 branch) | 5 of 9 | 7.4% | $53.8M | $724.4M |
| Lincoln, SD (1 branch) | 21 of 26 | <0.1% | $28.6M | $647.52B |
Metro areas
| Metro area | Rank | Deposit share | Deposits | Metro total |
|---|---|---|---|---|
| Sioux City, IA-NE-SD (1 branch) | 10 of 30 | 3.2% | $152.8M | $4.77B |
| Worthington, MN (1 branch) | 5 of 9 | 7.4% | $53.8M | $724.4M |
| Sioux Falls, SD (1 branch) | 36 of 39 | <0.1% | $28.6M | $1.13T |
| Branch | Location | ZIP | Deposits |
|---|---|---|---|
| Premier Bank (main office) | Rock Valley, IA | 51247 | $316.1M |
| Alcester Bank Branch | Alcester, SD | 57001 | $152.8M |
| Rock Rapids Branch | Rock Rapids, IA | 51246 | $84.8M |
| Adrian Branch | Adrian, MN | 56110 | $53.8M |
| Doon Branch | Doon, IA | 51235 | $35.6M |
| Hudson Branch | Hudson, SD | 57034 | $28.6M |
Source: FDIC Summary of Deposits, June 30, 2026. How the survey works.
Regulator records: FDIC BankFind (cert 34384) · FFIEC NIC profile (RSSD 2539960)