Branch Network
FNB Bank Locations & Branches Fontanelle, Iowa
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FNB Bank operates 5 branches from its headquarters in Fontanelle, IA, .
FNB Bank branch network
All 5 branches are in IOWA, across 5 cities. Its largest office by deposits is the Greenfield Branch office in Greenfield, IA, with $87.0M (41.2% of its branch deposits). It had the same number of branches on June 30, 2025.
FNB Bank at a glance
It reports no CET1 ratio; its Tier 1 leverage ratio was 14.48% at Q2 2026, above the 9% community bank leverage ratio requirement for being considered well capitalized.
- Total assets, Q2 2026
- $274.6M
- Tier 1 leverage ratio, Q2 2026
- 14.48%
- Deposit insurance
- FDIC
- Regulator
- Federal Reserve
- Latest call report
- Q2 2026, FFIEC 051
- Established
- 1905
Full financial profile · Is FNB Bank safe? · FNB 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: Fontanelle, IA (1 branch) | 1 of 1 | 100.0% | $56.6M |
| State: IA (5 branches) | 129 of 261 | 0.2% | $211.3M |
Ranked by total assets among banks headquartered in the state: Largest banks in Iowa.
Share by county and metro area
FNB 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 |
|---|---|---|---|---|
| Adair, IA (2 branches) | 1 of 4 | 46.8% | $143.6M | $307.0M |
| Cass, IA (2 branches) | 4 of 7 | 2.9% | $42.4M | $1.45B |
| Woodbury, IA (1 branch) | 16 of 20 | 0.7% | $25.3M | $3.45B |
Metro areas
| Metro area | Rank | Deposit share | Deposits | Metro total |
|---|---|---|---|---|
| Sioux City, IA-NE-SD (1 branch) | 26 of 30 | 0.5% | $25.3M | $4.77B |
| Branch | Location | ZIP | Deposits |
|---|---|---|---|
| Greenfield Branch | Greenfield, IA | 50849 | $87.0M |
| FNB Bank (main office) | Fontanelle, IA | 50846 | $56.6M |
| Massena Branch | Massena, IA | 50853 | $30.3M |
| Correctionville Branch | Correctionville, IA | 51016 | $25.3M |
| Anita Branch | Anita, IA | 50020 | $12.1M |
Source: FDIC Summary of Deposits, June 30, 2026. How the survey works.
Regulator records: FDIC BankFind (cert 954) · FFIEC NIC profile (RSSD 617743)