Exhibit 23.9

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Registration Statement on Form S-3 of American Midstream Partners, LP of our report dated March 24, 2017 relating to the financial statements of Okeanos Gas Gathering Company, LLC, which appears in American Midstream Partners, LP’s Annual Report on Form 10-K for the year ended December 31, 2016. We also consent to the reference to us under the heading “Experts” in such Registration Statement.

/s/ PricewaterhouseCoopers LLP

Houston, Texas

January 31, 2018