Core Molding (CMT) 10-K 2019 FY Annual report

Exhibit 23

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statements No. 333-105819, No. 333-107143, No. 333-136123, and No. 333-174349 on Forms S-8 and Registration Statement No. 333-221561 on Form S-3 of Core Molding Technologies, Inc. of our report dated March 13, 2020, relating to the consolidated financial statements and Schedule II and effectiveness of internal control over financial reporting, appearing in this Annual Report on Form 10-K.

/s/ Crowe Horwath LLP

Columbus, Ohio

March 13, 2020