Exhibit 23
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in the Registration Statement on Form S-8 (No. 333-193690 and 333-205099) of our report dated June 21, 2024, with respect to the financial statements and supplemental schedule of ONE Gas, Inc. 401(k) Plan included in this Annual Report on Form 11-K for the year ended December 31, 2023.
/s/ Forvis Mazars, LLP
Tulsa, Oklahoma
June 21, 2024