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Sundance State Bank Locations & Branches Sundance, Wyoming
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Sundance State Bank operates 2 branches from its headquarters in Sundance, WY, .
Sundance State Bank branch network
Its 2 branches span 2 states and 2 cities. The most are in SOUTH DAKOTA (1) and WYOMING (1). WYOMING holds 95.8% of its branch deposits. Its largest office by deposits is its main office in Sundance, WY, with $244.4M (95.8% of its branch deposits). On June 30, 2025 it had 1 branch, 1 fewer than in 2026.
Sundance State Bank at a glance
Its CET1 capital ratio was 15.07% at Q2 2026, comfortably above the 7% level required once the capital conservation buffer is included.
- Total assets, Q2 2026
- $290.9M
- CET1 ratio, Q2 2026
- 15.07%
- Deposit insurance
- FDIC
- Regulator
- Federal Reserve
- Established
- 1895
Full financial profile · Is Sundance 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: Sundance, WY (1 branch) | 1 of 1 | 100.0% | $244.4M |
| State: WY (1 branch) | 26 of 44 | 1.1% | $244.4M |
Ranked by total assets among banks headquartered in the state: Largest banks in Wyoming.
Share by county and metro area
Sundance 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 |
|---|---|---|---|---|
| Crook, WY (1 branch) | 1 of 3 | 68.2% | $244.4M | $358.1M |
| Lawrence, SD (1 branch) | 8 of 8 | 1.1% | $10.8M | $981.0M |
Metro areas
| Metro area | Rank | Deposit share | Deposits | Metro total |
|---|---|---|---|---|
| Gillette, WY (1 branch) | 5 of 12 | 11.4% | $244.4M | $2.14B |
| Spearfish, SD (1 branch) | 8 of 8 | 1.1% | $10.8M | $981.0M |
| Branch | Location | ZIP | Deposits |
|---|---|---|---|
| Sundance State Bank (main office) | Sundance, WY | 82729 | $244.4M |
| Spearfish Branch | Spearfish, SD | 57783 | $10.8M |
Source: FDIC Summary of Deposits, June 30, 2026. How the survey works.
Regulator records: FDIC BankFind (cert 1169) · FFIEC NIC profile (RSSD 94755)