Exhibit 23.1 Consent of Independent Auditors We consent to the reference to our firm under the caption "Experts" and to the use of our reports dated March 31, 1999 pertaining to the financial statements and schedule of Insight Communications Company, L.P. and our report dated April 5, 1999 pertaining to the financial statements of Insight Communications of Central Ohio, LLC in the Registration Statement (Form S-1) and related Prospectus of Insight Communications Company, Inc. for the registration of its Class A Common Stock. /s/ Ernst & Young LLP Ernst & Young LLP New York, New York May 10, 1999