Branch Network
Great Plains Bank Locations & Branches Eureka, South Dakota
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Great Plains Bank operates 3 branches from its headquarters in Eureka, SD, .
Great Plains Bank branch network
All 3 branches are in SOUTH DAKOTA, across 3 cities. Its largest office by deposits is the Aberdeen Branch office in Aberdeen, SD, with $49.1M (40.7% of its branch deposits). It had the same number of branches on June 30, 2025.
Great Plains Bank at a glance
It reports no CET1 ratio; its Tier 1 leverage ratio was 17.69% at Q2 2026, above the 9% community bank leverage ratio requirement for being considered well capitalized.
- Total assets, Q2 2026
- $150.4M
- Tier 1 leverage ratio, Q2 2026
- 17.69%
- Deposit insurance
- FDIC
- Regulator
- FDIC
- Latest call report
- Q2 2026, FFIEC 051
- Established
- 1920
Full financial profile · Is Great Plains Bank safe? · Great Plains 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: Eureka, SD (1 branch) | 1 of 2 | 70.6% | $43.9M |
| State: SD (3 branches) | 47 of 82 | <0.1% | $120.6M |
Ranked by total assets among banks headquartered in the state: Largest banks in South Dakota.
Share by county and metro area
Great Plains 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 |
|---|---|---|---|---|
| Brown, SD (1 branch) | 8 of 12 | 2.5% | $49.1M | $2.00B |
| Mcpherson, SD (1 branch) | 1 of 3 | 46.5% | $43.9M | $94.3M |
| Marshall, SD (1 branch) | 3 of 3 | 19.2% | $27.6M | $143.6M |
Metro areas
| Metro area | Rank | Deposit share | Deposits | Metro total |
|---|---|---|---|---|
| Aberdeen, SD (1 branch) | 11 of 15 | 2.2% | $49.1M | $2.22B |
| Branch | Location | ZIP | Deposits |
|---|---|---|---|
| Aberdeen Branch | Aberdeen, SD | 57401 | $49.1M |
| Great Plains Bank (main office) | Eureka, SD | 57437 | $43.9M |
| Eden Branch | Eden, SD | 57232 | $27.6M |
Source: FDIC Summary of Deposits, June 30, 2026. How the survey works.
Regulator records: FDIC BankFind (cert 505) · FFIEC NIC profile (RSSD 589158)