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Mason City National Bank Locations & Branches Mason City, Illinois
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Mason City National Bank operates 1 branch from its headquarters in Mason City, IL, .
Mason City National Bank branch network
Its one office is in Mason City, ILLINOIS. It had the same number of branches on June 30, 2025.
Mason City National Bank at a glance
It reports no CET1 ratio; its Tier 1 leverage ratio was 15.34% at Q2 2026, above the 9% community bank leverage ratio requirement for being considered well capitalized.
- Total assets, Q2 2026
- $91.4M
- Tier 1 leverage ratio, Q2 2026
- 15.34%
- Deposit insurance
- FDIC
- Regulator
- OCC
- Latest call report
- Q2 2026, FFIEC 051
- Established
- 1944
Full financial profile · Is Mason City National Bank safe? · Mason City National 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: Mason City, IL (1 branch) | 1 of 2 | 75.6% | $80.1M |
| State: IL (1 branch) | 313 of 379 | <0.1% | $80.1M |
Ranked by total assets among banks headquartered in the state: Largest banks in Illinois.
Share by county and metro area
Mason City National 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 |
|---|---|---|---|---|
| Mason, IL (1 branch) | 2 of 7 | 17.5% | $80.1M | $456.4M |
Metro area share: not on file. None of this bank's branches sit in a metropolitan or micropolitan area in the FDIC branch directory.
| Branch | Location | ZIP | Deposits |
|---|---|---|---|
| Mason City National Bank (main office) | Mason City, IL | 62664 | $80.1M |
Source: FDIC Summary of Deposits, June 30, 2026. How the survey works.
Regulator records: FDIC BankFind (cert 16198) · FFIEC NIC profile (RSSD 108746)