Bank Routing Number

Bank of the Sierra Routing Number

The primary ABA routing number (RTN) for Bank of the Sierra, Porterville, CA is shown below.

Primary ABA / RTN

121137027

Verify before you send money. This is the bank's primary registered routing number, taken from the FFIEC National Information Center institution record (last refreshed here on October 8, 2026). Banks often use a different routing number for wire transfers than for ACH, and large banks vary it by region; always confirm the correct number on a check or with your bank before initiating a transfer.

What is an ABA routing number?

An ABA routing number, also called a routing transit number (RTN), is a 9-digit code that identifies a U.S. financial institution in the payment system. It tells ACH transfers, Fedwire payments, and paper checks which bank to route money to. The format was created by the American Bankers Association in 1910 and is still the backbone of U.S. domestic payments.

What is the difference between a routing number and an account number?

Your routing number identifies the bank; your account number identifies your specific account at that bank. On a paper check, the routing number is the 9-digit number in the bottom-left, and the account number is to its right.

What is the Bank of the Sierra routing number?

The Bank of the Sierra routing number is 121137027. It is the primary ABA routing transit number registered to Bank of the Sierra, headquartered in Porterville, CA. A bank can hold more than one routing number, so this is the one on record for the institution, not necessarily the one printed on every check. The number comes from the FFIEC National Information Center institution record, last refreshed here on October 8, 2026.

What is the Bank of the Sierra wire routing number?

This page lists 121137027, the primary routing number registered to Bank of the Sierra. The record does not say whether the bank uses the same number for wire transfers, and many banks use a separate routing number for domestic wires. Confirm the wire routing number with Bank of the Sierra before sending a wire.

Is ABA number 121137027 the routing number for Bank of the Sierra?

Yes. ABA number 121137027 is the primary routing number registered to Bank of the Sierra. Check it against the routing number on a check or in your online banking before sending an ACH payment, because a bank can use different numbers by region or product.

Which bank uses routing number 121137027?

Routing number 121137027 belongs to Bank of the Sierra, headquartered in Porterville, CA. It is the bank's primary ABA routing number (FDIC certificate 22597).

Routing numbers of similar-size institutions in California

Credit union, Redwood City, CA: Provident Credit Union: 321171731
Bank, Corte Madera, CA: Bank of Marin: 121141877
Credit union, Huntington Beach, CA: Nuvision Federal Credit Union: 322282399
Credit union, San Diego, CA: California Coast Credit Union: 322281578
Bank, Irvine, CA: Commercial Bank of California: 122243596
Bank, Los Angeles, CA: PCB Bank: 122043602
Bank, San Diego, CA: California Bank of Commerce, N.A.: 122243402
Credit union, Bakersfield, CA: Valley Strong Credit Union: 322273722

All routing numbers in California

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Regulator records: FDIC BankFind (cert 22597) · FFIEC NIC profile (RSSD 662369)