EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (No. 333-118205) and Forms S-3 (No. 333-177119 and No. 333-191064) of Westlake Chemical Corporation of our reports dated February 25, 2015 relating to Westlake Chemical Corporation consolidated financial statements, financial statement schedule, and the effectiveness of internal control over financial reporting, and Westlake Chemical OpCo LP combined financial statements, which appear in this Form 10-K.

/s/ PricewaterhouseCoopers LLP

Houston, Texas

February 25, 2015