EXHIBIT 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the following Registration Statements:  

(1) Registration Statement (Form S-3 No. 333-211906) pertaining to debt securities and common stock of Park-Ohio Holdings Corp.

(2) Registration Statement (Form S-8 No. 333-204713) pertaining to the Park-Ohio Holdings Corp. 2015 Equity and Incentive Compensation Plan,

(3) Registration Statement (Form S-8 No. 333-182467) pertaining to the Park-Ohio Holdings Corp. Amended and Restated 1998 Long-Term Incentive Plan,

(4) Registration Statement (Form S-8 No. 333-01047) pertaining to the Individual Account Retirement Plan,    

(5) Registration Statement (Form S-8 No. 333-58161) pertaining to the Park-Ohio Holdings Corp. Amended and Restated 1998 Long-Term Incentive Plan,    

(6) Registration Statement (Form S-8 No. 333-110536) pertaining to the Park-Ohio Holdings Corp. Amended and Restated 1998 Long-Term Incentive Plan,

(7) Registration Statement (Form S-8 No. 333-137540) pertaining to the Park-Ohio Holdings Corp. Amended and Restated 1998 Long-Term Incentive Plan, and

(8) Registration Statement (Form S-8 No. 333-161474)    pertaining to the Park-Ohio Holdings Corp. Amended and Restated 1998 Long-Term Incentive Plan;

of our reports dated March 8, 2018, with respect to the consolidated financial statements and schedule of Park-Ohio Holdings Corp. and subsidiaries and the effectiveness of internal control over financial reporting of Park-Ohio Holdings Corp. and subsidiaries included in this Annual Report (Form 10-K) of Park-Ohio Holdings Corp. and subsidiaries for the year ended December 31, 2017.

/s/ Ernst & Young LLP

Cleveland, Ohio

March 8, 2018