Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in this Registration Statement on Form S-3 of First Financial Bancorp. of our report dated February 24, 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 First Financial Bancorp. for the year ended December 31, 2016, and to the reference to us under the heading "Experts" in the prospectus.
/s/ Crowe Horwath LLP
Crowe Horwath LLP
Indianapolis, Indiana
July 28, 2017