Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the following registration statements (and any amendments thereto) of IAC/InterActiveCorp of our reports dated February 28, 2017, with respect to the consolidated financial statements and schedule of IAC/InterActiveCorp, and the effectiveness of internal control over financial reporting of IAC/InterActiveCorp, included in this Annual Report (Form 10-K) for the year ended December 31, 2016.

COMMISSION FILE NO.:

Form S-8, No. 333-127410

Form S-8, No. 333-127411

Form S-4, No. 333-124303

Form S-8, No. 333-146940

Form S-8, No. 333-154875

Form S-8, No. 333-174538

Form S-8, No. 333-192186

/s/ ERNST & YOUNG LLP

New York, New York

February 28, 2017