Exhibit 23

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the Registration Statement (Form S-3 No. 333-62664) of Argosy Gaming Company and in the Registration Statement (Form S-8 No. 33-76418) pertaining to the Stock Option Plan and Director Option Plan of Argosy Gaming Company of our reports dated March 14, 2005, with respect to the consolidated financial statements and schedule of Argosy Gaming Company, Argosy Gaming Company management’s assessment of the effectiveness of internal control over financial reporting, and the effectiveness of internal control over financial reporting of Argosy Gaming Company, included in this Annual Report (Form 10-K) for the year ended December 31, 2004.

ERNST & YOUNG LLP

Chicago, Illinois
March 14, 2005