| Copperhead Compressor Station | Compressor station | Blaine County, OK | Petrolink Energy LLC | |
| Copperhead Compressor Station Facility | Compressor station | Lincoln County, OK | Superior Midstream, LLC | |
| Coppock Compressor Station | Compressor station | Major County, OK | Bce-Mach LLC | |
| Corazon Compressor Station | Compressor station | NM | Enterprise Products Operating LP | |
| Cornell Mahoney Gas Plant | Gas processing plant | Yoakum County, TX | Xto Energy Inc | In service |
| Corona Compressor Station | Compressor station | NM | Transwestern Pipeline Company, LLC | |
| Corona Station 8 CS | Compressor station | NM | Transwestern Pipeline Company, LLC | |
| Corpus Christi LNG | LNG export terminal | San Patricio County, TX | Cheniere Energy | In service |
| Corry Storage | Underground storage | Erie County, PA | National Fuel Gas Supply Corporation | In service |
| Cotton Compressor Station | Compressor station | Roger Mills County, OK | Markwest Oklahoma Gas Company, LLC | |
| Cotton Tie Compressor Station | Compressor station | Grady County, OK | ET Gathering & Processing, LLC | |
| Cotton Valley Gas Plant | Gas processing plant | Webster Parish, LA | Xto Energy Inc | In service |
| Cottonwood Compressor Station | Compressor station | Alfalfa County, OK | ET Gathering & Processing, LLC | |
| Countrymark Refining & Logistics Jolietville terminal | Terminal | IN | Countrymark Refining And Logistics, LLC | |
| Countrymark Refining & Logistics Peru terminal | Terminal | IN | Countrymark Refining And Logistics, LLC | |
| Countrymark Refining & Logistics Switz City terminal | Terminal | IN | Countrymark Refining And Logistics, LLC | |
| County Line | Gas processing plant | ND | Liberty | |
| County Line Compressor Station | Compressor station | Woods County, OK | ET Gathering & Processing, LLC | |
| County Line Gas Plant | Gas processing plant | Williams County, ND | Silver Hill Energy Partners | |
| County Line Plant | Gas processing plant | Williams County, ND | Liberty Midstream Solutions, LLC | In service |
| Countyline Compressor Station | Compressor station | Stephens County, OK | Enerfin Gathering LLC | |
| Courbet Compressor Station | Compressor station | Carter County, OK | ET Gathering & Processing, LLC | |
| Cove Point LNG | LNG export terminal | Calvert County, MD | Dominion Energy | In service |
| Covington Compressor Station | Compressor station | Garfield County, OK | Mustang Gas Products, LLC | |
| Cowboy Booster Station | Compressor station | Canadian County, OK | DCP Operating Company, LP | |
| Cowboy Central Delivery Point Terminal | Gas processing plant | NM | Xto Energy Inc | |
| Cowtown/Corvette Plant | Gas processing plant | Hood County, TX | Cowtown Gas Processing Partners LP | In service |
| Cox Bussel Booster Station | Compressor station | Carter County, OK | DCP Operating Company, LP | |
| Cox CDP Booster Station | Compressor station | Grady County, OK | Targa Pipeline Midcontinent LLC | |
| Cox City | Gas processing plant | Grady County, OK | ET Gathering & Processing, LLC, Enable Products LLC | In service |
| Cox City Compressor Station | Compressor station | Grady County, OK | ET Gathering & Processing, LLC | |
| Cox Lateral Compressor Station | Compressor station | Woodward County, OK | Oneok Field Services Inc | |
| Coyanosa | Gas processing plant | Pecos County, TX | ETC Field Services LLC | In service |
| Coyote Compressor Station | Compressor station | NM | Targa Northern Delaware LLC | |
| Coyote Compressor Station (NM) | Compressor station | NM | Targa Northern Delaware LLC | |
| Cpi Operations LLC terminal | Terminal | NJ | Cpi Operations LLC | |
| Cranberry Lake | Underground storage | Clare County, MI | Consumers Energy Inc | In service |
| Cranberry Pipeline Corporation, Bonham Station | Compressor station | WV | | |
| Cranberry Pipeline Corporation, Buffalo Station | Compressor station | WV | | |
| Cranberry Pipeline Corporation, Heizer Station | Compressor station | WV | | |
| Cranberry Pipeline Corporation, Manila Creek Stat | Compressor station | WV | | |
| Cranberry Pipeline Corporation, Martins Branch ST | Compressor station | WV | | |
| Cranberry Pipeline Corporation, Meeting House Cre | Compressor station | WV | | |
| Cranberry Pipeline Corporation, Rich Creek Station | Compressor station | WV | | |
| Cranberry Pipeline Corporation, Staten Run Statio | Compressor station | WV | | |
| Cranberry Pipeline Corporation, Wayne/Adkins Stat | Compressor station | WV | | |
| Cranberry Pipeline Corporation, Wayne/WayneCS | Compressor station | WV | | |
| Crane Gas Plant | Gas processing plant | Upton County, TX | Navitas Midstream Midland Basin, LLC | In service |
| Crawford | Underground storage | Hocking County, OH | Columbia Gas Transmission, LLC | In service |
| Crawford Station | Compressor station | NM | Transwestern Pipeline Company, LLC | |