Branch Network
Security State Bank Locations & Branches Iron River, Wisconsin
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Security State Bank operates 3 branches from its headquarters in Iron River, WI, .
Security State Bank branch network
All 3 branches are in WISCONSIN, across 3 cities. Its largest office by deposits is its main office in Iron River, WI, with $83.7M (79.5% of its branch deposits). It had the same number of branches on June 30, 2025.
Security State Bank at a glance
Its CET1 capital ratio was 29.15% at Q2 2026, comfortably above the 7% level required once the capital conservation buffer is included.
- Total assets, Q2 2026
- $136.2M
- CET1 ratio, Q2 2026
- 29.15%
- Deposit insurance
- FDIC
- Regulator
- FDIC
- Established
- 1911
Full financial profile · Is Security 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: Iron River, WI (1 branch) | 1 of 2 | 79.8% | $83.7M |
| State: WI (3 branches) | 152 of 185 | <0.1% | $105.2M |
Ranked by total assets among banks headquartered in the state: Largest banks in Wisconsin.
Share by county and metro area
Security 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 |
|---|---|---|---|---|
| Bayfield, WI (2 branches) | 2 of 4 | 24.9% | $94.2M | $378.4M |
| Douglas, WI (1 branch) | 6 of 6 | 1.0% | $11.0M | $1.07B |
Metro areas
| Metro area | Rank | Deposit share | Deposits | Metro total |
|---|---|---|---|---|
| Duluth, MN-WI (1 branch) | 26 of 26 | 0.2% | $11.0M | $6.78B |
| Branch | Location | ZIP | Deposits |
|---|---|---|---|
| Security State Bank (main office) | Iron River, WI | 54847 | $83.7M |
| Brule Branch | Brule, WI | 54820 | $11.0M |
| Port Wing Branch | Port Wing, WI | 54865 | $10.6M |
Source: FDIC Summary of Deposits, June 30, 2026. How the survey works.
Regulator records: FDIC BankFind (cert 9036) · FFIEC NIC profile (RSSD 43052)