Exhibit 15.1

The Board of Directors and Shareholders of Atmos Energy Corporation

Atmos Energy Corporation

We are aware of the incorporation by reference in the Registration Statement (Form S-3) of Atmos Energy Corporation for the registration of $4,000,000,000 of its debt securities and shares of its common stock of our report dated February 4, 2020 relating to the unaudited condensed consolidated interim financial statements of Atmos Energy Corporation that are included in its Form 10-Q for the quarter ended December 31, 2019.

/s/ ERNST & YOUNG LLP

Dallas, Texas

February 11, 2020