| Lodi Gas Storage Kirby Hills | Underground storage | Solano County, CA | Lodi Gas Storage, LLC | In service |
| Logan Booster Station | Compressor station | Beaver County, OK | DCP Operating Company, LP | |
| Logan County Plant | Gas processing plant | Logan County, OK | Atlas Asphalt Products Inc | |
| Logansport | Underground storage | Marion County, WV | Equitrans, L.P. | In service |
| Lompoc Oil & Gas Plant | Gas processing plant | Santa Barbara County, CA | Freeport-Mcmoran Oil & Gas | In service |
| Lone Camp | Gas processing plant | Palo Pinto County, TX | Enbridge G & P (North Texas), L.P. | In service |
| Lone Camp(600) | Underground storage | Palo Pinto County, TX | SWG Pipeline, L.l.c. | In service |
| Lone Elm/stockton | Underground storage | Franklin County, AR | Black Hills Energy | In service |
| Lone Star Compressor Station | Compressor station | Blaine County, OK | Enlink Midstream Services, LLC | |
| Lone Star NGL Hattiesburg Hattiesburg terminal | Terminal | MS | Lone Star NGL Hattiesburg | |
| Lone Star NGL Mont Belvieu terminal | Terminal | TX | Lone Star NGL LLC | |
| Lone Star Plant | Gas processing plant | Bee County, TX | FL Rich Gas Services, LP | In service |
| Lone Tree Compressor Station | Compressor station | Custer County, OK | ET Gathering & Processing, LLC | |
| Lonesome Creek | Gas processing plant | ND | ONEOK Inc. | |
| Lonesome Creek Gas Plant | Gas processing plant | Mckenzie County, ND | ONEOK Inc. | |
| Lonesome Creek Natural Gas Processing Plant | Gas processing plant | McKenzie County, ND | ONEOK Inc. | In service |
| Longboard LNG | LNG import terminal | HI | | Pre-filing |
| Longhorn Gas Plant | Gas processing plant | Archer County, TX | Enerfin Resources Ii-92 Limited Partnership | In service |
| Longview | Gas processing plant | Gregg County, TX | Enbridge G & P (East Texas) L.P. | In service |
| Longview Gas Plant | Gas processing plant | Gregg County, TX | American Midstream | In service |
| Loogootee | Underground storage | Daviess County, IN | Southern Indiana Gas & Electric Co | |
| Loop | Underground storage | Gaines County, TX | Oneok Texas Gas Storage, LP | |
| Lorain | Underground storage | Lorain County, OH | Columbia Gas Transmission, LLC | In service |
| Loreed | Underground storage | Osceola County, MI | ANR Pipeline Company | In service |
| Lorton Compressor Station | Compressor station | Mcintosh County, OK | Wentworth Operating CO | |
| Los Medanos | Underground storage | Contra Costa County, CA | Pacific Gas and Electric Co | In service |
| Lost Cabin Gas Plant | Gas processing plant | Fremont County, WY | Conocophillips, Contango Resources | In service |
| Lost Tank Compressor Station | Compressor station | NM | Enterprise Products Operating LP | |
| Loudon | Underground storage | Fayette County, IL | Natural Gas Pipeline Company of America LLC | In service |
| Louisiana LNG | LNG export terminal | LA | | Under construction |
| Love Storage | Underground storage | Perry County, OH | Ngo Development Corporation | |
| Loving Gas Plant | Gas processing plant | Loving County, TX | | |
| Loving Gas Plant (Loving County) | Gas processing plant | Loving County, TX | | |
| Loving Plant | Gas processing plant | Loving County, TX | Targa Delaware LLC | In service |
| Lovington Booster Station | Compressor station | NM | DCP Operating Company, LP | |
| Lowry Gas Plant | Gas processing plant | Cameron Parish, LA | Targa Resources | In service |
| Loyal Compressor Station | Compressor station | Kingfisher County, OK | DCP Operating Company, LP | |
| Lucas | Underground storage | Ashland County, OH | Columbia Gas Transmission, LLC | In service |
| Lucerne | Gas processing plant | Weld County, CO | DCP Operating Company, LP | In service |
| Lucerne Federal 3/5 CDP | Compressor station | NM | Hilcorp Energy Company | |
| Lucerne Federal 6 CDP | Compressor station | NM | Hilcorp Energy Company | |
| Lucerne II | Gas processing plant | Weld County, CO | DCP Operating Company, LP | In service |
| Lucien Compressor Station | Compressor station | Noble County, OK | ET Gathering & Processing, LLC | |
| Lucknow Allentown terminal | Terminal | PA | Lucknow - Highspire Terminal | |
| Lucknow Altoona terminal | Terminal | PA | Lucknow - Highspire Terminals | |
| Lucknow Coraopolis terminal | Terminal | PA | Lucknow - Highspire Terminals | |
| Lucknow Delmont terminal | Terminal | PA | Lucknow - Highspire Terminals | |
| Lucknow Dupont terminal | Terminal | PA | Lucknow - Highspire Terminals | |
| Lucknow Fullerton terminal | Terminal | PA | Lucknow - Highspire Terminals | |
| Lucknow Highspire terminal | Terminal | PA | Lucknow - Highspire Terminals | |