Southwest Iowa Renewable Energy (SWIOU) 10-Q 2011 Q2 Quarterly report

       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 on Form 10-Q of Southwest Iowa Renewable Energy, LLC (the “Company”) for the period ended March 31, 2011, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Brian T. Cahill, President and 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:

1.   The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange  Act of 1934, as amended; and

2.   The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Company Name
By:	/s/ Brian T. Cahill
	President and Chief Executive Officer Dated: May 9, 2011