EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the Registration Statement (Form S-8) pertaining to the PolyOne Corporation 2008 Equity and Performance Incentive Plan of our report dated February 27, 2008 (except for Note R as to which the date is May 20, 2008), with respect to the consolidated financial statements and schedule of PolyOne Corporation included in its Current Report on Form 8-K dated May 20, 2008, filed with the Securities and Exchange Commission, and our report dated February 27, 2008 on the effectiveness of internal control over financial reporting of PolyOne Corporation included in its Annual Report (Form 10-K) for the year ended December 31, 2007, filed with the Securities and Exchange Commission.

/s/ ERNST & YOUNG LLP

Cleveland, Ohio
May 20, 2008

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