What Is a Routing Number? A routing number is a string of nine digits intended to identify a financial institution during a transaction. You may also hear routing numbers referred to as ABA numbers.

Every check has a routing number, and you might occasionally be asked to provide this routing number when linking an online account to a checking or savings account at your local bank or credit union.

When managing your bank accounts or conducting financial transactions, you may encounter scenarios where it’s important to ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Khadija Khartit is a strategy, investment, and funding expert, and an educator of fintech ...

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