What does ABA mean in banking

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In banking, ABA refers to a nine-digit number used to identify specific banks in the United States for domestic transactions.

This code, also called a routing number or routing transit number, directs funds to the correct bank during processes like direct deposits, ACH transfers, wire transfers, automatic bill payments, and clearing paper checks. The ABA number is only used for transactions within the United States. For international transfers, banks use SWIFT codes or IBANs instead.

You can find your ABA number in several ways:

On a check: It is the first group of nine digits at the bottom left corner.
On bank statements: It is usually listed near the top or in your account details summary.
Online banking: Log in to your bank’s website or app and check your account profile or direct deposit information.