First Bank of San Luis Obispo
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What is my Bank's Routing Number?
The Routing Number for First Bank of San Luis Obispo is: 122238077

You may also find the Routing Number on your checks. Look for the 9-digit number on the far left for Personal Checks. On On most business checks, the check number is listed first on the far left, followed by the 9-digit Routing number. See example below.

Check's Routing Number