FDIC-insured bank
Security Bank Midwest — Tyndall, SD
Bank headquartered in Tyndall, South Dakota, part of MIDWEST BANCSHARES INC.
Source: FDIC BankFind Suite, data as of June 30, 2026, fetched September 5, 2026
Headquarters and contact
| Address | 1600 Main St Tyndall, SD 57066 |
| County | Bon Homme |
| Website | www.sbmidwest.bank |
| Phone | not published in FDIC data, see the bank's website |
FDIC record
| FDIC Certificate | 485 |
| Federal Reserve RSSD ID | 435255 |
| Status | Active |
| Charter class | NM (STATE) |
| Holding company | MIDWEST BANCSHARES INC |
| Domestic offices | 6 |
| Financials as of | June 30, 2026 |
How to find your Security Bank Midwest routing number
FDIC does not publish ABA routing numbers, and many banks use different routing numbers by state or by account type. The reliable places to find yours: the bottom left of a check from this bank, the "account details" screen in its online banking, or its official website at www.sbmidwest.bank.
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Offices nearest to headquarters
| Security Bank Midwest main office Tyndall, SD |
1600 Main St, 57066 |
| Viborg Branch Viborg, SD |
105 N. Main Street, 57070 |
| Chancellor Branch Chancellor, SD |
221 Main St, 57015 |
| Lennox Branch Lennox, SD |
200 Security Drive, 57039 |
| Heron Lake Br Heron Lake, MN |
274 10th St, 56137 |
| Jackson, Mn Branch Jackson, MN |
202 Grant St, 56143 |
Where Security Bank Midwest has offices
Cities with the most Security Bank Midwest offices
Largest banks headquartered elsewhere in South Dakota
| Citibank, National Association Sioux Falls | $1.98 trillion |
| Wells Fargo Bank, National Association Sioux Falls | $1.91 trillion |
| The Bancorp Bank, National Association Sioux Falls | $9.21 billion |
| Pathward, National Association Sioux Falls | $7.31 billion |
| Dacotah Bank Aberdeen | $4.92 billion |
| First Bank & Trust Brookings | $4.78 billion |
| First PREMIER Bank Sioux Falls | $3.64 billion |
| First Dakota National Bank Yankton | $3.39 billion |
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