Exhibit 99.1
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Certification of Chief Executive Officer Pursuant to 18 USC (S) 1350


Certification accompanying the report of Mahaska Investment Company on Form 10-K
for the year ended December 31, 2002. This certification is furnished solely
under Section 906 of the Sarbanes-Oxley Act of 2002 and is not filed as part of
the Report on Form 10-K.

     I hereby certify that the accompanying Report of Mahaska Investment Company
on Form 10-K for the year ended December 31, 2002 fully complies with the
requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934
and that information contained in such Report fairly presents, in all material
respects, the financial condition and results of operations of Mahaska
Investment Company.

/s/ Charles S. Howard
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Charles S. Howard
Chairman, President &
Chief Executive Officer