EXHIBIT 32.1


                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


In connection with the Quarterly Report of 1st Source Corporation (1st Source)
on Form 10-Q for the quarterly period ended March 31, 2005, as filed with the
Securities and Exchange Commission on the date hereof (the "Report"), I,
Christopher J. Murphy III, Chief Executive Officer of the Company, certify,
pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002, that to my knowledge:

     (1)  The Report fully complies with the  requirements  of sections 13(a) or
          15(d) of the Securities and Exchange Act of 1934; and

     (2)  The  information  contained  in the  Report  fairly  presents,  in all
          material respects,  the financial  condition and results of operations
          of 1st Source.



By:


/s/CHRISTOPHER J. MURPHY III
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Christopher J. Murphy III
Chief Executive Officer
April 28, 2005