Bank · FDIC insured
First Security Bank
A $151.1M bank headquartered in Mackinaw, IL, with 4 branches in Illinois. Best rates: CDs 3.40% and savings 0.75% APY.
First Security Bank Carrot Score
69
Carrot Score
Higher than 23% of U.S. banks and credit unions
#11 of 27 in Peoria, IL metroHow the score works →
Deposits are federally insured by the FDIC up to $250,000 per depositor.
About First Security Bank
Founded in 1907 as the First National Bank of Mackinaw, First Security Bank purchased the original Mackinaw Bank (founded in 1882) and transitioned to a state charter in the mid-1960s.
Headquartered in Mackinaw, Illinois, the bank operates four branches across Mackinaw, Heritage Lake, Deer Creek, and Danvers, alongside a loan production office in Peoria.
First Security Bank serves the local community by providing full-service banking, including commercial, agricultural, and consumer lending, deposit accounts, and investment services.
- Headquarters
- 101 E Fast Ave, Mackinaw, IL 61755
- FDIC certificate
- 3698 ↗
Branches
4 branches in Illinois
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Illinois
4 branches
Peoria area · 3
- First Security BankMain office101 E Fast Ave, Mackinaw, IL 61755Directions
- Deer Creek Branch201 E 1st Ave, Deer Creek, IL 61733Directions
- Heritage Lake Branch#2 Bradford Drive, Mackinaw, IL 61755Directions
Bloomington area · 1
- Danvers Branch116 E Exchange St, Danvers, IL 61732Directions
Walk-in offices from the FDIC directory as of September 4, 2026. Directions open Google Maps. A nearby branch doesn’t mean you can join or open an account.
Financial details
| Measure | This bank | Peers’ middle | Strongest quarter |
|---|---|---|---|
| CapitalLeverage ratio | 9.22% | 10.98% | 13.00% or more |
| Troubled loansNoncurrent | 0.00% | 0.42% | 0.09% or less |
| ProfitabilityReturn on assets | 1.14% | 1.24% | 1.68% or more |
| LendingLoans per $100 deposited | $98 | $81 | — |
- CapitalLeverage ratio9.22%Peers’ middle 10.98% · Top 25% 13.00%+
- Troubled loansNoncurrent0.00%Peers’ middle 0.42% · Top 25% ≤0.09%
- ProfitabilityReturn on assets1.14%Peers’ middle 1.24% · Top 25% 1.68%+
- LendingLoans per $100 deposited$98Peers’ middle $81
Compared with the 2,650 banks with $100 million to $1 billion in assets. The strongest quarter is what the best 25% of them reach: more capital and profit, fewer troubled loans. Lending has no better end.Troubled loans are noncurrent: 90 or more days late, or no longer earning interest.
Regulators’ own ratings of First Security Bank are confidential. These figures are what it reports to the FDIC each quarter, set beside its peers; they aren’t a rating.