The routing number for Old Second Bank is 071900760. This number is used for various banking activities, including ACH (Automated Clearing House) transfers and wire transfers.

For more details or to confirm this information, you can visit the following links:

1. Old Second Bank's Check Ordering page.
2. Information regarding updates to direct deposit accounts can be found on their Transition page from FMB.
3. Details about the routing number in relation to COVID-19 information are available on their COVID-19 Information page.
4. You can also refer to the routing number on Wise.com for additional verification.

If you have any further questions, feel free to ask!

Sources

Check Ordering - Old Second BankFMB - Old SecondOLD SECOND NATL BK AURORA Routing Number IL - 071900760COVID-19 Information - Old Second BankOLD SECOND NATIONAL BANK Routing Number IL - 071923349[PDF] Wire Transfer User Guide - Old Second Bank[PDF] WELC ME - Old Second Bank

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