| Pavillion Gas Plant | Gas processing plant | WY | | |
| Pavonia | Underground storage | Ashland County, OH | Columbia Gas Transmission, LLC | In service |
| Payne Compressor Station | Compressor station | Blaine County, OK | Oneok Field Services Inc | |
| Peaceable Compressor Station | Compressor station | Pittsburg County, OK | ET Gathering & Processing, LLC | |
| Pearl Compressor Station | Compressor station | Blaine County, OK | Enlink Midstream Services, LLC | |
| Pearl Davis Compressor Station | Compressor station | Texas County, OK | Scout Energy Management LLC | |
| Pebble 8-7 State Com Tank Battery | Compressor station | NM | Spur Energy Partners LLC | |
| Pecan Grove Compressor Station | Compressor station | Hughes County, OK | Petrolink Energy LLC | |
| Pecan Station | Underground storage | Tom Green County, TX | Fort Concho Gas Storage Inc | |
| Pecatonica | Underground storage | Winnebago County, IL | Nicor | In service |
| Peck (gamble) Compressor Station | Compressor station | Dewey County, OK | Oneok Field Services Inc | |
| Peckham Industries Inc terminal | Terminal | NY | Peckham Industries Inc | |
| Pecos Bend Gas Processing Plant | Gas processing plant | Reeves County, TX | Caprock Permian Processing LLC | In service |
| Pecos Diamond | Gas processing plant | Eddy County, NM | DCP Operating Company, LP | In service |
| Pecos Gas Plant | Gas processing plant | Reeves County, TX | Eagleclaw Midstream Ventures | In service |
| Pecos Gas Plant (Reeves County) | Gas processing plant | Reeves County, TX | | |
| Pecos River Gas Plant | Gas processing plant | Loving County, TX | | |
| Pecos River Plant | Gas processing plant | Reeves County, TX | Medallion Operating Company, LLC | In service |
| Pecos Valley Terminal | Terminal | TX | | |
| Pedlik Compressor Station | Compressor station | Kingfisher County, OK | Bce-Mach III Midstream Holdings LLC | |
| Pegasus Gas Plant | Gas processing plant | Midland County, TX | | |
| Pegasus Plant | Gas processing plant | Midland County, TX | DCP Midstream, LP | In service |
| Pelican Island Storage Termls Galveston terminal | Terminal | TX | Pelican Island Storage Termls | |
| Pelican Plant | Gas processing plant | St. Mary Parish, LA | Enlink Pelican Plant, LLC | In service |
| Pelican Refining Co LLC terminal | Terminal | TX | Pelican Asphalt Co LLC | |
| Pendleton Compressor Facility | Compressor station | Dewey County, OK | Tall Oak Midcon, LLC | |
| Penn Compressor Station | Compressor station | Logan County, OK | Otter Creek Midstream | |
| Penn Cryo Gas Plant | Gas processing plant | Butler County, PA | Mountain Gathering, LLC | In service |
| Penroc Booster Station | Compressor station | NM | DCP Operating Company, LP | |
| Peoples Gas Co Llc/kinter Sta | Compressor station | Indiana County, PA | Peoples Gas Company LLC | |
| Peoples Gas Co Llc/rubright Comp Sta | Compressor station | Westmoreland County, PA | Peoples Gas Company LLC | |
| Peoples Natural Gas Co Llc/gibson Sta | Compressor station | Washington County, PA | The Peoples Natural Gas Company | |
| Peoples Natural Gas Co Llc/girty Sta | Compressor station | Armstrong County, PA | The Peoples Natural Gas Company | |
| Peoples Natural Gas Co Llc/roaring Run Sta | Compressor station | Armstrong County, PA | The Peoples Natural Gas Company | |
| Peoples Natural Gas Co Llc/valley Sta | Compressor station | Armstrong County, PA | The Peoples Natural Gas Company | |
| Peoples Natural Gas Co/atwood Booster Sta | Compressor station | Armstrong County, PA | The Peoples Natural Gas Company | |
| Peoples Natural Gas Co/creighton Comp Sta | Compressor station | Allegheny County, PA | The Peoples Natural Gas Company | |
| Peoples Natural Gas Co/fisher Sta | Compressor station | Armstrong County, PA | The Peoples Natural Gas Company | |
| Peoples Natural Gas Co/shoemaker Sta | Compressor station | Armstrong County, PA | The Peoples Natural Gas Company | |
| Peoples Natural Gas Co/village Sta | Compressor station | Armstrong County, PA | The Peoples Natural Gas Company | |
| Peoples Natural Gas/crooked Creek Comp Sta | Compressor station | Armstrong County, PA | The Peoples Natural Gas Company | |
| Peregrine Plant | Gas processing plant | Culberson County, TX | | |
| Perkins Plant | Gas processing plant | Payne County, OK | Superior Midstream, LLC, Superior Pipeline Company L.l.c. | In service |
| Pernell Compressor Station | Compressor station | Garvin County, OK | Enerfin Gathering LLC | |
| Perry Compressor Station | Compressor station | Noble County, OK | Enable Oklahoma Intrastate Transmission, LLC | |
| Perry Storage | Underground storage | Perry County, OH | Ngo Transmission Inc | In service |
| Perrysburg Storage | Underground storage | Cattaraugus County, NY | National Fuel Gas Supply Corporation | In service |
| Perryville | Underground storage | Franklin Parish, LA | Perryville Gas Storage, LLC | In service |
| Petree Compressor Station | Compressor station | Canadian County, OK | DCP Operating Company, LP | |
| Petro 49 Barge Division terminal | Terminal | AK | Petro 49 Inc | |