Callon Petroleum (CPE) 8-K Callon and Carrizo Shareholders Approve Merger

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 (FormS-3ASRNo. 333-230748) of Callon Petroleum Company, and

(2) Registration Statements (FormS-8 Nos.333-176061,333-212044,333-109744,333-188008, and333-224829) of Callon Petroleum Company;

of our report dated February 28, 2019, with respect to the consolidated financial statements of Carrizo Oil & Gas, Inc., and our report dated February 28, 2019, with respect to the effectiveness of internal control over financial reporting of Carrizo Oil & Gas, Inc., included in this Current Report onForm 8-K.

/s/ Ernst & Young LLP

Houston, Texas

December 20, 2019