Comerica routing number: state-specific reference

How Comerica routing numbers work

Comerica uses different routing numbers depending on the state of account opening. The routing number identifies the institution; the account number identifies the specific account.

The Comerica routing number is the nine-digit ABA routing-and-transit number that identifies the bank and the regional clearing house responsible for processing payments. Unlike most national banks that use a single routing number, Comerica uses different routing numbers depending on the state where the account was originally opened — a function of the bank’s historical multi-state expansion.

For most everyday uses (direct deposit setup, ACH transfers, payroll setup), the routing number paired with the account number is the standard identifier. For wire transfers, the routing number is sometimes different from the ACH routing number, and the in-branch staff or the customer-service phone line is the safest place to confirm the right one for the specific transaction type.

Where to find the routing number on a check

The routing number is the leftmost nine-digit number printed at the bottom of every paper check, before the account number and check number.

On a printed Comerica cheque, the bottom line shows three numeric fields in fixed order: the routing number on the left (nine digits), the account number in the middle, and the check number on the right. The routing number is the same on every cheque from the same account; the account number is unique to the account; the check number increments per cheque.

For accounts where paper cheques are not on hand, the routing number is also visible inside online banking (typically in the account-detail view) and on every account statement. Public-research orientation guidance from the CFPB covers the broader payment-rail context that is worth a quick read alongside any first-time setup.

State-specific routing patterns

Comerica routing numbers vary by state of account opening because of the bank’s multi-state expansion history.

An account opened at a Texas branch typically uses a different routing number than one opened at a California or Michigan branch, even though the underlying institution is the same Comerica Bank. For ACH and direct-deposit setup, the routing number to use is the one associated with the state where the account was originally opened. The upstream Comerica site is the canonical source for current routing numbers per state. For payroll-setup mistakes, the most common error is using the wrong state’s routing number; the resulting deposit usually bounces back rather than landing in the wrong account, but the cost is a one-payday delay.

ACH routing versus wire routing

Comerica wire-routing numbers can differ from ACH-routing numbers; confirm with member service before submitting a wire to avoid a multi-day reversal.

For wire transfers, the routing number is sometimes different from the ACH routing number used for direct deposits and bill payments. The cost of an incorrect wire-routing number is much higher than an incorrect ACH — wires are typically same-day final, and a misrouted wire requires a recall through the receiving institution that can take days. A five-minute confirmation call to the Comerica customer-service phone line before the first wire from any new account is cheap insurance against a multi-day reversal.