| Murphy Oil USA Anniston terminal | Terminal | AL | Murphy Oil USA, Inc. | |
| Murphy Oil USA Freeport terminal | Terminal | FL | Murphy Oil USA, Inc. | |
| Murphy Oil USA Jonesboro terminal | Terminal | AR | Murphy Oil USA, Inc. | |
| Murphy Oil USA Meridian terminal | Terminal | MS | Murphy Oil USA, Inc. | |
| Murphy Oil USA Montgomery terminal | Terminal | AL | Murphy Oil USA, Inc. | |
| Murphy Oil USA Sheffield terminal | Terminal | AL | Murphy Oil USA, Inc. | |
| Murphy Oil USA Tampa terminal | Terminal | FL | Murphy Oil USA, Inc. | |
| Murray Compressor Station | Compressor station | Garvin County, OK | ET Gathering & Processing, LLC | |
| Murrysville | Underground storage | Allegheny County, PA | The Peoples Natural Gas Company | In service |
| Musket Fort Worth Ethanol Terminal | Terminal | TX | Musket Corp | |
| Musket Fort Worth Meacham Facility DFW terminal | Terminal | TX | Musket Corp | |
| Musket Terminal | Terminal | ND | | |
| Muskie Storage | Underground storage | Muskingum County, OH | Ngo Transmission Inc | In service |
| Muskogee Plant | Gas processing plant | Muskogee County, OK | Vallourec Star LP | |
| Muskogee Porcelain Floor Tile Plant | Gas processing plant | Muskogee County, OK | Dalitalia LLC | |
| Muskogee Sand Plant | Gas processing plant | Muskogee County, OK | Apac Central Inc | |
| Mustang | Gas processing plant | Grady County, OK | DCP Operating Company, LP | In service |
| Mustang Booster Station | Compressor station | Canadian County, OK | DCP Operating Company, LP | |
| Mustang Fuel Brown Compressor Station | Compressor station | Hughes County, OK | Mustang Fuel Corp | |
| Muttonville | Underground storage | Macomb County, MI | ANR Pipeline Company | In service |
| Mutual Compressor Station | Compressor station | Woodward County, OK | ET Gathering & Processing, LLC | |
| Myer Mountain Compressor Station | Compressor station | Pittsburg County, OK | Markwest Oklahoma Gas Company, LLC | |
| Myers Compressor Station | Compressor station | Osage County, OK | Osage Hills Pipeline Company, LLC | |
| N 7 Lateral Compressor | Compressor station | NM | Hilcorp Energy Company | |
| NGL Energy Chesapeake LPG Terminal | Terminal | VA | NGL Energy Partners LP | |
| NGL Supply Wholesale Dexter terminal | Terminal | MO | NGL Supply Wholesale LLC | |
| NGL Supply Wholesale Janesville terminal | Terminal | WI | NGL Supply Wholesale LLC | |
| NGL Supply Wholesale Lebanon terminal | Terminal | IN | NGL Supply Wholesale LLC | |
| NGL Supply Wholesale Light terminal | Terminal | AR | NGL Supply Wholesale LLC | |
| NGL Supply Wholesale Rosemount terminal | Terminal | MN | NGL Supply Wholesale LLC | |
| NGL Supply Wholesale West Memphis terminal | Terminal | AR | NGL Supply Wholesale LLC | |
| NK Asphalt Albuquerque terminal | Terminal | NM | NK Asphalt Partners | |
| NK Asphalt Artesia terminal | Terminal | NM | NK Asphalt Partners | |
| NK Asphalt Glendale terminal | Terminal | AZ | NK Asphalt Partners | |
| NM Gas Co. ESPEJO CS | Compressor station | NM | New Mexico Gas | |
| NM Gas Co. REDONDO CS | Compressor station | NM | New Mexico Gas | |
| NM Gas Co. STAR LAKE CS | Compressor station | NM | New Mexico Gas | |
| Nala Compressor Station | Compressor station | Blaine County, OK | ET Gathering & Processing, LLC | |
| Naples Compressor Station | Compressor station | Grady County, OK | ET Gathering & Processing, LLC | |
| Napoleon | Underground storage | Ascension Parish, LA | Bridgeline Holdings, LP | In service |
| Napoleonville Salt Dome LPG Storage | Underground storage | LA | | |
| Napoleonville Salt Dome Natural Gas Storage | Underground storage | LA | | |
| Nash | Gas processing plant | Grant County, OK | Semgas, L.p. | In service |
| Nash Compressor Station | Compressor station | NM | Enterprise Products Operating LP | |
| Nash Draw CS | Compressor station | NM | Southern Union Gas Services, LTD | |
| Nashville Storage | Underground storage | Cattaraugus County, NY | National Fuel Gas Supply Corporation | In service |
| Natchez Terminal | Terminal | MS | | |
| National Grid LNG Providence LNG | LNG peak-shaving or storage | RI | National Grid LNG, L.P. | In service |
| National Helium Plant | Gas processing plant | Seward County, KS | DCP Operating Company, LP | In service |
| Natl Fuel Gas Supply Corp/carpenter Hollow Interconnect Sta | Gas processing plant | Potter County, PA | National Fuel Gas Supply Corporation | |