Branch Network
Ergo Bank Locations & Branches Markesan, Wisconsin
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Ergo Bank operates 6 branches from its headquarters in Markesan, WI, .
Ergo Bank branch network
All 6 branches are in WISCONSIN, across 6 cities. Its largest office by deposits is its main office in Markesan, WI, with $73.5M (32.5% of its branch deposits). On June 30, 2025 it had 5 branches, 1 fewer than in 2026.
Ergo Bank at a glance
Its CET1 capital ratio was 9.67% at Q2 2026, above the 7% level required once the capital conservation buffer is included.
- Total assets, Q2 2026
- $276.7M
- CET1 ratio, Q2 2026
- 9.67%
- Deposit insurance
- FDIC
- Regulator
- FDIC
- Established
- 1910
Full financial profile · Is Ergo 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: Markesan, WI (1 branch) | 1 of 2 | 54.2% | $73.5M |
| State: WI (6 branches) | 115 of 185 | 0.1% | $226.2M |
Ranked by total assets among banks headquartered in the state: Largest banks in Wisconsin.
Share by county and metro area
Ergo 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 |
|---|---|---|---|---|
| Dodge, WI (2 branches) | 7 of 10 | 5.2% | $82.6M | $1.58B |
| Green Lake, WI (1 branch) | 5 of 6 | 5.0% | $73.5M | $1.46B |
| Monroe, WI (3 branches) | 5 of 8 | 7.4% | $70.0M | $951.8M |
Metro areas
| Metro area | Rank | Deposit share | Deposits | Metro total |
|---|---|---|---|---|
| Beaver Dam, WI (2 branches) | 7 of 10 | 5.2% | $82.6M | $1.58B |
| Branch | Location | ZIP | Deposits |
|---|---|---|---|
| Ergo Bank (main office) | Markesan, WI | 53946 | $73.5M |
| 314 West State Street Branch | Fox Lake, WI | 53933 | $61.0M |
| Kendall Branch | Kendall, WI | 54638 | $29.9M |
| Wilton Branch | Wilton, WI | 54670 | $27.6M |
| Lomira Branch | Lomira, WI | 53048 | $21.6M |
| Norwalk Branch | Norwalk, WI | 54648 | $12.6M |
Source: FDIC Summary of Deposits, June 30, 2026. How the survey works.
Regulator records: FDIC BankFind (cert 10004) · FFIEC NIC profile (RSSD 599643)