Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We have issued our reports dated February 26, 2020, with respect to the consolidated financial statements and internal control over financial reporting included in the Annual Report of Diamondback Energy, Inc. on Form 10-K for the year ended December 31, 2019. We consent to the incorporation by reference of said reports in the Registration Statements of Diamondback Energy, Inc. on Forms S-3ASR (File No. 333-218346, effective May 30, 2017), (File No. 333-228584, effective November 29, 2018) and (File No. 333-234764 effective November 18, 2019), and on Forms S-8 (File No. 333-188552, effective May 13, 2013), (File No. 333-215798, effective January 27, 2017), (File No. 333-228637, effective November 30, 2018) and (File No. 333-235671, effective December 23, 2019).

/s/ GRANT THORNTON LLP

Oklahoma City, Oklahoma

February 26, 2020