Headquartered in Tyndall, South Dakota, Security Bank Midwest is a state-chartered bank with $304.1M in total assets and $238.8M in deposits as of Q2 2026. It operates 6 offices across 2 states. Its charter dates back to 1932.
Security Bank Midwest has a TellerScore of 66 out of 100 (moderate) based on Q2 2026 data — higher than only 31% of its 2,650 banks with $100 million – $1 billion. Among 56 banks headquartered in South Dakota, it ranks 41st. Problem-loan coverage contributes the most (95/100, 2.7%); earnings contributes the least (49/100, 0.73%).
TellerScore · Q2 2026
Scorecard
The TellerScore is our own summary of the figures this institution reports publicly; it is not issued or endorsed by any government agency. It is not a prediction, and deposits within insurance limits are protected either way.
9 quarters
Health trend
From Q2 2025 to Q2 2026, the score fell 2 points (68 → 66), mostly because the loan quality component weakened by 13 points.
Show as table
| Quarter | TellerScore |
|---|---|
| Q2 2024 | 67 |
| Q3 2024 | 67 |
| Q4 2024 | 67 |
| Q1 2025 | 68 |
| Q2 2025 | 68 |
| Q3 2025 | 68 |
| Q4 2025 | 69 |
| Q1 2026 | 68 |
| Q2 2026 | 66 |
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| Quarter | Tier 1 leverage ratio |
|---|---|
| Q2 2024 | 8.80% |
| Q3 2024 | 9.15% |
| Q4 2024 | 9.15% |
| Q1 2025 | 9.16% |
| Q2 2025 | 9.45% |
| Q3 2025 | 9.81% |
| Q4 2025 | 9.82% |
| Q1 2026 | 10.27% |
| Q2 2026 | 10.52% |
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| Quarter | Noncurrent loans |
|---|---|
| Q2 2024 | 0.18% |
| Q3 2024 | 0.31% |
| Q4 2024 | 0.24% |
| Q1 2025 | 0.00% |
| Q2 2025 | 0.00% |
| Q3 2025 | 0.00% |
| Q4 2025 | 0.00% |
| Q1 2026 | 0.35% |
| Q2 2026 | 0.40% |
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| Quarter | Return on assets |
|---|---|
| Q2 2024 | 1.14% |
| Q3 2024 | 1.10% |
| Q4 2024 | 1.07% |
| Q1 2025 | 0.84% |
| Q2 2025 | 0.77% |
| Q3 2025 | 0.78% |
| Q4 2025 | 0.75% |
| Q1 2026 | 0.93% |
| Q2 2026 | 0.73% |
| Quarter | Score | Assets | Capital | Problem loans | ROA | Loans/deposits |
|---|---|---|---|---|---|---|
| Q2 2026 | 66 | $304.1M | 10.52% | 0.40% | 0.73% | 89.1% |
| Q1 2026 | 68 | $321.9M | 10.27% | 0.35% | 0.93% | 85.7% |
| Q4 2025 | 69 | $328.3M | 9.82% | 0.00% | 0.75% | 88.0% |
| Q3 2025 | 68 | $331.9M | 9.81% | 0.00% | 0.78% | 90.9% |
| Q2 2025 | 68 | $327.7M | 9.45% | 0.00% | 0.77% | 85.2% |
| Q1 2025 | 68 | $338.1M | 9.16% | 0.00% | 0.84% | 85.4% |
| Q4 2024 | 67 | $344.3M | 9.15% | 0.24% | 1.07% | 89.9% |
| Q3 2024 | 67 | $341.5M | 9.15% | 0.31% | 1.10% | 86.0% |
| Q2 2024 | 67 | $340.5M | 8.80% | 0.18% | 1.14% | 83.2% |
2,650 peers · $100 million – $1 billion
How it compares with peers
Percentile against banks of similar size nationwide (100th = best among peers; for ratios where lower is better, the scale is flipped).
Similar-size banks in South Dakota
| Institution | Score | Assets | Capital | Problem loans | Compare |
|---|---|---|---|---|---|
| One American BankBank Centerville, SD | 40 out of 100, Below average | $285.2M | 8.3% | 1.56% | vs |
| Commercial State Bank, of WagnerBank Wagner, SD | 66 out of 100, Moderate | $260.4M | 11.8% | 2.29% | vs |
| Frontier BankBank Sioux Falls, SD | 67 out of 100, Moderate | $349.2M | 8.8% | 0.00% | vs |
| Farmers State BankBank Parkston, SD | 76 out of 100, Strong | $254.8M | 10.0% | 0.00% | vs |
| Security National Bank of South DakotaBank Dakota Dunes, SD | 93 out of 100, Very strong | $251.5M | 14.1% | 0.00% | vs |
| Rivers Edge BankBank Marion, SD | 68 out of 100, Moderate | $357.1M | 8.3% | 0.16% | vs |
Deposit insurance
Is my money safe at Security Bank Midwest?
Yes. Security Bank Midwest is an FDIC-insured institution (FDIC certificate #485). Deposits are insured up to $250,000 per depositor, per insured bank, for each account ownership category.
An estimated 26.2% of deposits ($62.7M) are above the $250,000 FDIC insurance limit, above the peer median of 24%. Insured balances are protected regardless of the score.
The tier 1 leverage ratio is 10.52%, well above the 5% level regulators use as the "well capitalized" benchmark for this measure. Its total risk-based capital ratio is 0.00% (benchmark: 10%).
6 locations
Branches
Security Bank Midwest lists 6 offices in 6 cities across 2 states. Most locations:
- Chancellor, SD (1)
- Heron Lake, MN (1)
- Jackson, MN (1)
- Lennox, SD (1)
- Tyndall, SD (1)
- Viborg, SD (1)
Identity & history
Profile
- Legal name
- Security Bank Midwest
- Former names
- Security State Bank
- Type
- State-chartered bank
- FDIC certificate #
- 485
- RSSD ID
- 435255
- Primary regulator
- FDIC
- Holding company
- Midwest Bancshares Inc
- Established
- November 1, 1932
- Headquarters
- 1600 Main St, Tyndall, SD 57066
- Website
- www.sbmidwest.bank
- Employees
- 32
Quick answers
Security Bank Midwest: common questions
Is Security Bank Midwest FDIC insured?
Yes. Security Bank Midwest is an FDIC-insured institution (FDIC certificate #485). Deposits are insured up to $250,000 per depositor, per insured bank, for each account ownership category.
What is Security Bank Midwest's TellerScore?
66 out of 100 (Moderate), based on its Q2 2026 publicly reported figures. The TellerScore is our own summary and is not issued by any government agency.
Has Security Bank Midwest ever failed?
There is no failure record for FDIC certificate #485 in the FDIC failed bank list.
How many branches does Security Bank Midwest have?
6 offices as of the latest FDIC data, in 2 states.
Nearby
Highest-scoring banks and credit unions with branches near Tyndall
| Institution | Score | Assets | Capital | Problem loans | Compare |
|---|---|---|---|---|---|
| First Savings BankBank Beresford, SD | 83 out of 100, Strong | $1.6B | 19.3% | 0.90% | vs |
| The Farmers and Merchants State BankBank Scotland, SD | 83 out of 100, Strong | $36.0M | 11.9% | 0.08% | vs |
| Campbell County Bank, Inc.Bank Herreid, SD | 82 out of 100, Strong | $240.7M | 12.9% | 0.58% | vs |
| Farmers and Merchants State Bank, Bloomfield, NebraskaBank Bloomfield, NE | 77 out of 100, Strong | $232.9M | 9.5% | 0.07% | vs |
| Community BankBank Avon, SD | 76 out of 100, Strong | $69.3M | 12.2% | 0.60% | vs |
| Farmers State BankBank Parkston, SD | 76 out of 100, Strong | $254.8M | 10.0% | 0.00% | vs |