comScore (SCOR) S-8 Registration of securities for employees

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the Registration Statement (Form S-8 No. 333-00000) pertaining to the 2007 Equity Incentive Plan, as amended and restated, of comScore, Inc. of our reports dated February 22, 2012, with respect to the consolidated financial statements of comScore, Inc., and the effectiveness of internal control over financial reporting of comScore, Inc., included in its Annual Report (Form 10-K) for the year ended December 31, 2011, filed with the Securities and Exchange Commission.

/s/ Ernst & Young LLP

McLean, Virginia

February 22, 2012