Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the Registration Statement (Form S-8 No. 333-169338) pertaining to Williams Partners L.P.’s (the “Partnership”) Long-Term Incentive Plan of our reports dated February 25, 2015, with respect to the consolidated financial statements of the Partnership and the effectiveness of internal control over financial reporting of the Partnership, included in this Annual Report (Form 10-K) for the year ended December 31, 2014.