Exhibit 32.1

SECTION 1350 CERTIFICATIONS OF INSIGHT MIDWEST, L.P.

The undersigned hereby certify that the annual report on Form 10-K of Insight Midwest, L.P. (“the registrant”) for the year ended December 31, 2006, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, and that the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the registrant.

/s/ MICHAEL S. WILLNER

Michael S. Willner
Chairman and Chief Executive Officer
Insight Midwest, L.P.
March 29, 2007

/s/ JOHN ABBOT

John Abbot
Executive Vice President and
Chief Financial Officer
Insight Midwest, L.P.
March 29, 2007