Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We have issued our reports dated February 27, 2014, with respect to the consolidated financial statements and internal control over financial reporting of Regency Energy Partners LP included in the Annual Report of Regency Energy Partners LP on Form 10-K for the year ended December 31, 2013. We hereby consent to the incorporation by reference of said reports in the Registration Statements of Regency Energy Partners LP on Forms S-3 (File No. 333-169307, File No. 333-174578, File No. 333-181690, and File No. 333-185179), on Form S-4 (File No. 333-192184) and on Forms S-8 (File No. 333-140088, File No. 333-167082, and File No. 333-178573).

/s/ GRANT THORNTON LLP

Dallas, Texas

February 27, 2014