Bank First Security Bank
First Security Bank is a federally insured bank based in Byron, Minnesota.
- Type
- Bank
- Charter
- State-chartered commercial bank, not a Federal Reserve member
- Primary regulator
- FDIC
- Established
- December 27, 1904
- Headquarters
- Byron, MN
- FDIC certificate #
- 9728
- Fed RSSD ID
- 109154
- Holding company
- Olmsted Bcorp Inc
- Website
- WWW.fsbbyron.com
Source: U.S. FDIC BankFind & NCUA 5300 Call Report (public data). Data sources · Data as of Q1 2026
Branches by state
First Security Bank operates 1 branch location in Minnesota. Select a state to drill down to its towns and individual branches.
Ownership
First Security Bank is owned by Olmsted Bcorp Inc. See the full ownership & merger history.
First Security Bank financial summary
Other banks in Minnesota
Federally insured banks headquartered in Minnesota, by total assets.
- Ameriprise Bank, FSB $25.51B
- Bridgewater Bank $5.32B
- Frandsen Bank & Trust $3.69B
- Stearns Bank National Association $3.3B
- Minnwest Bank $2.97B
- Merchants Bank, National Association $2.93B
- Tradition Capital Bank $2.68B
- Think Mutual Bank $2.27B
Similar-size banks
Institutions close to First Security Bank’s $159.1M in assets.
- Farmers State Bank $159M
- Family Bank $159.3M
- Bank of Whittier, National Association $158.8M
- Park State Bank & Trust $158.8M
- Citizens' Bank, Inc. $158.6M
- Bank Michigan $159.7M