Branch Network
Security State Bank Locations & Branches Alexandria, South Dakota
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Security State Bank operates 3 branches from its headquarters in Alexandria, SD, .
Security State Bank branch network
All 3 branches are in SOUTH DAKOTA, across 3 cities. Its largest office by deposits is its main office in Alexandria, SD, with $59.5M (62.2% 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 12.32% at Q2 2026, above regulatory requirements.
- Total assets, Q2 2026
- $102.1M
- CET1 ratio, Q2 2026
- 12.32%
- Deposit insurance
- FDIC
- Regulator
- FDIC
- Latest call report
- Q2 2026, FFIEC 051
- Established
- 1946
Full financial profile · Is Security State Bank safe? · Security State 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: Alexandria, SD (1 branch) | 1 of 1 | 100.0% | $59.5M |
| State: SD (3 branches) | 53 of 82 | <0.1% | $95.6M |
Ranked by total assets among banks headquartered in the state: Largest banks in South Dakota.
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 |
|---|---|---|---|---|
| Hanson, SD (2 branches) | 1 of 2 | 70.0% | $75.5M | $107.8M |
| Mccook, SD (1 branch) | 3 of 4 | 9.8% | $20.1M | $204.9M |
Metro areas
| Metro area | Rank | Deposit share | Deposits | Metro total |
|---|---|---|---|---|
| Mitchell, SD (2 branches) | 6 of 10 | 6.0% | $75.5M | $1.27B |
| Sioux Falls, SD (1 branch) | 37 of 39 | <0.1% | $20.1M | $1.13T |
| Branch | Location | ZIP | Deposits |
|---|---|---|---|
| Security State Bank (main office) | Alexandria, SD | 57311 | $59.5M |
| Montrose Branch | Montrose, SD | 57048 | $20.1M |
| Spencer Branch | Spencer, SD | 57374 | $16.0M |
Source: FDIC Summary of Deposits, June 30, 2026. How the survey works.
Regulator records: FDIC BankFind (cert 16448) · FFIEC NIC profile (RSSD 270652)