| Calcasieu Pass LNG | LNG export terminal | LA | Venture Global | In service |
| Caledonia | Underground storage | Lowndes County, MS | Caledonia Energy Partners, LLC | In service |
| Calhoun Compressor Station | Compressor station | Pittsburg County, OK | Markwest Oklahoma Gas Company, LLC | |
| California-San Joaquin Basin Onshore CA10 | Gas processing plant | Kern County, CA | Elk Hills Power, LLC | In service |
| Caljet Phoenix terminal | Terminal | AZ | Caljet | |
| Calumet | Gas processing plant | Canadian County, OK | ET Gathering & Processing, LLC, Enable Products LLC | In service |
| Calumet Compressor Station | Compressor station | Canadian County, OK | Howard Energy Partners | |
| Camargo Booster Station | Compressor station | Ellis County, OK | DCP Operating Company, LP | |
| Cameron LNG | LNG export terminal | Cameron Parish, LA | Cameron Lng, LLC | In service |
| Camp Houston Compressor Station | Compressor station | Woods County, OK | Williams Midstream Gas Services LLC | |
| Campbell Compressor Station | Compressor station | Major County, OK | Bce-Mach LLC | |
| Campo Viejo Plant | Gas processing plant | Yoakum County, TX | | |
| Camrick Compressor Station | Compressor station | Beaver County, OK | DCP Operating Company, LP | |
| Camrick Gas Plant | Gas processing plant | Beaver County, OK | Carrera Operating Company LLC | In service |
| Camrick Gas Processing Plant | Gas processing plant | Beaver County, OK | Crown Midstream LLC | |
| Cana Plant | Gas processing plant | Canadian County, OK | Enlink Midstream Services, LLC | In service |
| Canaan Pod 6 Compressor Station | Compressor station | Pittsburg County, OK | Abundance Energy Services LLC | |
| Canada Mountain | Underground storage | Bell County, KY | Delta Natural Gas Co Inc | In service |
| Canadian Compressor Station | Compressor station | Pittsburg County, OK | ET Gathering & Processing, LLC | |
| Canadian River Compressor Station | Compressor station | Blaine County, OK | Redcliff Midstream LLC | |
| Canadian Valley Natural Gas Processing | Gas processing plant | Canadian County, OK | ONEOK Inc., Oneok Field Services Inc | In service |
| Caney Creek Compressor Station | Compressor station | Coal County, OK | TPL Arkoma Midstream LLC | |
| Caney Valley Compressor Facility | Compressor station | Washington County, OK | Gateway Resources USA Inc | |
| Cannedy Creek Compressor Station | Compressor station | Caddo County, OK | ET Gathering & Processing, LLC | |
| Cannery Loop | Underground storage | Kenai Peninsula County, AK | Cook Inlet Natural Gas Storage | In service |
| Canton Booster | Compressor station | Blaine County, OK | DCP Operating Company, LP | |
| Canton Compressor Station | Compressor station | Blaine County, OK | ET Gathering & Processing, LLC | |
| Canute | Gas processing plant | Washita County, OK | ET Gathering & Processing, LLC, Enable Products LLC | In service |
| Canute Compressor Station | Compressor station | Washita County, OK | ET Gathering & Processing, LLC | |
| Canute El Paso Compressor Station | Compressor station | Washita County, OK | Enable Oklahoma Intrastate Transmission, LLC | |
| Canvasback Sand Drying Plant | Gas processing plant | Caddo County, OK | Warrior Minerals LLC | |
| Capiana Plant | Gas processing plant | Caddo Parish, LA | Enable Midstream Partners, LP | In service |
| Carbonyx Alpha Plant R And D | Gas processing plant | Carter County, OK | Carbonyx Inc | |
| Cardinal Glass Plant | Gas processing plant | Bryan County, OK | Cardinal FG | |
| Cardinal Ne Midstream Llc/painter Dehydration Sta | Gas processing plant | Tioga County, PA | | |
| Cargray Plant | Gas processing plant | Carson County, TX | ETC Field Services LLC | In service |
| Carlsbad CS | Compressor station | NM | Transwestern Pipeline Company, LLC | |
| Carlsbad Chaparral Gas Plant | Gas processing plant | Eddy County, NM | Enterprise Field Services LLC | In service |
| Carlsbad Gas Plant | Gas processing plant | NM | Crestwood New Mexico Pipeline LLC | |
| Carlton Compressor Station | Compressor station | Blaine County, OK | ET Gathering & Processing, LLC | |
| Carmen Compressor Station | Compressor station | Alfalfa County, OK | ET Gathering & Processing, LLC | |
| Carmen Gas Processing Plant | Gas processing plant | Alfalfa County, OK | Tall Oak Midcon, LLC | In service |
| Carney Ne Compressor Station | Compressor station | Lincoln County, OK | Superior Midstream, LLC | |
| Carpenter Compressor Station | Compressor station | Haskell County, OK | ET Gathering & Processing, LLC | |
| Carracas Compressor Station | Compressor station | NM | Harvest Four Corners, LLC | |
| Carracas Mesa Compressor Station | Compressor station | NM | Energen Resources Corp. | |
| Carrier Compressor Station | Compressor station | Garfield County, OK | Targa Pipeline Midcontinent Westok LLC | |
| Carson Federal I CDP | Compressor station | NM | Hilcorp Energy Company | |
| Carter Creek Gas Plant | Gas processing plant | Uinta County, WY | Hilcorp Energy Development LP | In service |
| Cartersville Compressor Station | Compressor station | Haskell County, OK | ET Gathering & Processing, LLC | |