FDIC-insured bank
First Security Bank — Union Star, MO
Bank headquartered in Union Star, Missouri, part of FIRST AMERICAN BANCSHARES INC.
Source: FDIC BankFind Suite, data as of June 30, 2026, fetched September 5, 2026
Headquarters and contact
| Address | 108 N 4th St Union Star, MO 64494 |
| County | Dekalb |
| Metro area | St. Joseph, MO-KS |
| Website | WWW.FIRSTSECURITYBANKMO.COM |
| Phone | not published in FDIC data, see the bank's website |
FDIC record
| FDIC Certificate | 1622 |
| Federal Reserve RSSD ID | 322551 |
| Status | Active |
| Charter class | NM (STATE) |
| Holding company | FIRST AMERICAN BANCSHARES INC |
| Domestic offices | 2 |
| Financials as of | June 30, 2026 |
How to find your First Security Bank 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.FIRSTSECURITYBANKMO.COM.
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Offices nearest to headquarters
| First Security Bank main office Union Star, MO |
108 N 4th St, 64494 |
| Trimble Branch Trimble, MO |
202 North Highway 169, 64492 |
Where First Security Bank has offices
Cities with the most First Security Bank offices
Largest banks headquartered elsewhere in Missouri
| UMB Bank, National Association Kansas City | $71.90 billion |
| Commerce Bank Kansas City | $35.02 billion |
| The Central Trust Bank Jefferson City | $20.31 billion |
| Stifel Bank and Trust Saint Louis | $19.62 billion |
| Enterprise Bank & Trust Clayton | $17.36 billion |
| Stifel Bank Saint Louis | $14.62 billion |
| First Bank St. Louis | $6.65 billion |
| Great Southern Bank Reeds Spring | $5.53 billion |
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