Bank Routing Number

The Security National Bank of Sioux City, Iowa Routing Number

The primary ABA routing number (RTN) for The Security National Bank of Sioux City, Iowa, Sioux City, IA is shown below.

Primary ABA / RTN

073900085

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 The Security National Bank of Sioux City, Iowa routing number?

The The Security National Bank of Sioux City, Iowa routing number is 073900085. It is the primary ABA routing transit number registered to The Security National Bank of Sioux City, Iowa, headquartered in Sioux City, IA. 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 The Security National Bank of Sioux City, Iowa wire routing number?

This page lists 073900085, the primary routing number registered to The Security National Bank of Sioux City, Iowa. 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 The Security National Bank of Sioux City, Iowa before sending a wire.

Is ABA number 073900085 the routing number for The Security National Bank of Sioux City, Iowa?

Yes. ABA number 073900085 is the primary routing number registered to The Security National Bank of Sioux City, Iowa. 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 073900085?

Routing number 073900085 belongs to The Security National Bank of Sioux City, Iowa, headquartered in Sioux City, IA. It is the bank's primary ABA routing number (FDIC certificate 4506).

Routing numbers of similar-size institutions in Iowa

Bank, Sioux City, IA: Liberty National Bank: 073922869
Credit union, Sioux City, IA: Telco Triad Community Credit Union: 273975991
Credit union, Sioux City, IA: Sioux Valley Credit Union: 273975823
Bank, Muscatine, IA: CBI Bank & Trust: 073900742
Bank, Reinbeck, IA: Lincoln Savings Bank: 073905527
Bank, Carroll, IA: Availa Bank: 073902546
Bank, Ankeny, IA: Community State Bank: 073910114
Bank, Waterloo, IA: Farmers State Bank: 073908045

All routing numbers in Iowa

View The Security National Bank of Sioux City, Iowa's full profile →

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Regulator records: FDIC BankFind (cert 4506) · FFIEC NIC profile (RSSD 418249)