Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in this Registration Statement on Form S-4 of Pacific Premier Bancorp, Inc. of our report dated March 16, 2017 relating to the consolidated financial statements and effectiveness of internal control over financial reporting appearing in the Annual Report on Form 10-K of Pacific Premier Bancorp, Inc. for the year ended December 31, 2016.

/s/ Crowe Horwath LLP

Los Angeles, California

October 30, 2017