Magnolia Oil & Gas (MGY) 8-K Magnolia Oil & Gas Corporation Announces Commencement of Exchange Offer and Consent

Exhibit 23.1

CONSENT OF INDEPENDENT AUDITORS

We consent to the incorporation by reference in Registration StatementNo. 333-226795 on FormS-3 and Registration StatementNo. 333-227722 on FormS-8 of Magnolia Oil & Gas Corporation of our report dated May 8, 2018, relating to the statements of revenue and direct operating expenses of the Giddings Assets for the years ended December 31, 2017, 2016 and 2015 (which report expresses an unmodified opinion and includes anemphasis-of-matter paragraph relating to the manner of presentation of the revenues and direct operating expenses of the Giddings Assets), appearing in this Current Report on Form8-K of Magnolia Oil & Gas Corporation dated June 7, 2019.

/s/ DELOITTE & TOUCHE LLP

Houston, Texas

June 7, 2019