1st Source Bank Routing Number (ABA): 071212128

1st Source Bank at a glance

Its CET1 capital ratio was 14.84% at Q2 2026, comfortably above the 7% level required once the capital conservation buffer is included.

Total assets, Q2 2026

$9.26B

CET1 ratio, Q2 2026

14.84%

Deposit insurance

FDIC

Regulator

Federal Reserve

Domestic offices

81 FDIC institution directory, current count

Established

1922

Full financial profile · Is 1st Source Bank safe? · Branch locations

What the digits mean

The first two digits, 07, place this number in the Federal Reserve Bank of Chicago's district (District 7). Digits five through eight, 1212, identify the institution within that district. The last digit, 8, is a check digit, and the number passes the standard check: weight the nine digits 3, 7, 1, 3, 7, 1, 3, 7, 1 and the sum is a multiple of 10.

Before you send money to 1st Source Bank

A routing number tells the payment network which financial institution holds an account. You give it with an account number for ACH transfers through the automated clearing house, such as direct deposit, bill pay and transfers from a checking account, which usually settle in one to two business days. An international wire to a US account normally needs the bank's SWIFT code as well.

Match this number against the one on your 1st Source Bank checks or in its online banking. Ask the bank for wire instructions (www.1stsource.com). Our record does not show whether this number receives wires. The Federal Reserve's E-Payments Routing Directory shows it: its Fedwire participant search lists the numbers that can receive Fedwire transfers, and its FedACH search lists those that receive ACH payments. How to confirm any routing number.

About 1st Source Bank

1st Source Bank is headquartered in South Bend, Indiana and was established in 1922. It is in the SOUTH BEND-MISHAWAKA, IN-MI metro area. It reported $9.26B in total assets and $7.43B in deposits for Q2 2026, the 5th largest of the 87 banks headquartered in Indiana. It reports 81 domestic offices. Its deposits have been FDIC insured since 1934. Its primary federal regulator is the Federal Reserve. 5 other banks and credit unions headquartered in South Bend have a routing number listed here.

What the digits in 071212128 mean

The first four digits, 0712, are the Federal Reserve routing symbol. The prefix 07 places the number in the 7th Federal Reserve District (Chicago). That is also the district where the bank is headquartered. Digits five through eight, 1212, identify the institution within its Federal Reserve district. The last digit, 8, is a check digit. Weighting the digits 3, 7 and 1 in turn gives 3 x 3 + 7 x 10 + 11 = 90, a multiple of 10, so 071212128 is a well-formed routing number. A mistyped digit almost always breaks that sum.

What is the 1st Source Bank routing number?

The 1st Source Bank routing number is 071212128. It is the primary ABA routing transit number registered to 1st Source Bank, headquartered in South Bend, IN. The number comes from the FFIEC National Information Center institution record, last refreshed here on October 25, 2026.

What is the 1st Source Bank wire routing number?

This page lists the primary routing number registered to 1st Source Bank. The record does not say whether the bank uses the same number for wire transfers. Confirm the wire routing number with 1st Source Bank before sending a wire.

Is ABA number 071212128 the routing number for 1st Source Bank?

Yes. It is the primary routing number registered to 1st Source Bank.

Which bank uses routing number 071212128?

It belongs to 1st Source Bank, headquartered in South Bend, IN. It is the bank's primary ABA routing number (FDIC certificate 9087).

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