1ST SECURITY BK Routing Number in MACKINAW, IL
1 1ST SECURITY BK routing number found in MACKINAW, IL. Click any routing number to view full details — for ACH transfers, direct deposits, and wire payments.
1ST SECURITY BK Routing Number in MACKINAW, IL
1ST SECURITY BK has 1 routing number registered in MACKINAW, IL with the American Bankers Association (ABA) and the Federal Reserve E-Payments Routing Directory. Each 9-digit routing number uniquely identifies 1ST SECURITY BK's MACKINAW processing location within the US payment network. BankZop sources all routing data directly from official ABA records — click any routing number above to view its full details and copy it instantly.
The 1ST SECURITY BK routing number for MACKINAW, IL is used for setting up direct deposits, authorising ACH payments, initiating domestic wire transfers, and check processing. Always use the specific routing number assigned to the location where your account was opened.
What to Do After Finding the 1ST SECURITY BK MACKINAW Routing Number
- Direct deposit: Provide the 9-digit routing number along with your account number to your employer's payroll system, the IRS (for tax refunds), or any government benefit agency.
- ACH bill payment: Enter the routing number when setting up electronic payments to utilities, insurance providers, or subscription services that debit your 1ST SECURITY BK account.
- Wire transfer: Confirm with 1ST SECURITY BK's wire department whether this ABA routing number applies to wire transfers — many banks use a different wire routing number.
- Check verification: Cross-check the routing number printed at the bottom-left of your 1ST SECURITY BK check against the number shown here to confirm accuracy.
Why 1ST SECURITY BK May Have This Routing Number in MACKINAW
1ST SECURITY BK uses a single routing number for MACKINAW, IL — assigned by the ABA to identify this specific 1ST SECURITY BK processing location within the Federal Reserve's payment system. This 9-digit code is what routes ACH debits, credits, and wire transfers to the correct 1ST SECURITY BK office for settlement.
ACH vs Wire Transfer — Which Routing Number to Use
This is one of the most common questions about 1ST SECURITY BK MACKINAW routing numbers:
| Transfer Type | Routing Number | Settlement |
|---|---|---|
| Direct Deposit / ACH | ABA routing number (this page) | 1–2 business days (same day for Same Day ACH) |
| Domestic Wire Transfer | Confirm with 1ST SECURITY BK directly — may differ | Same business day (real-time via Fedwire) |
| International Wire | SWIFT/BIC code required — find it here | 1–5 business days |
About 1ST SECURITY BK in MACKINAW, IL
1ST SECURITY BK serves customers in MACKINAW, IL through its local banking network. The routing number listed on this page are the ABA-registered identifier for 1ST SECURITY BK's MACKINAW operations — used by the Federal Reserve's payment infrastructure to route ACH and wire transactions to the correct financial institution.
To browse 1ST SECURITY BK routing numbers in other cities in IL, visit the 1ST SECURITY BK IL directory. For all 1ST SECURITY BK states, see the 1ST SECURITY BK routing number directory. For international transfers, use the SWIFT Code Lookup. For Indian bank transfers, use the IFSC Code Lookup.
Data sourced from the American Bankers Association (ABA) and the Federal Reserve E-Payments Routing Directory. Last reviewed Jun 2026 by BankZop Editorial Team.
Frequently Asked Questions — 1ST SECURITY BK Routing Numbers in MACKINAW
- Direct deposit — payroll, IRS tax refunds, Social Security, VA benefits
- ACH transfers — online bill payments, electronic debits, bank transfers
- Domestic wire transfers — same-day settlement via Fedwire (may use a separate wire routing number)
- Check payments — printed at the bottom-left of every 1ST SECURITY BK personal check
- ACH debit authorisations — recurring payments to utilities, subscriptions, insurance