| Janesville Compressor Station Replacement | ANR Pipeline Company | WI | | |
| Janus Compressor Station Expansion | Eqm Gathering Opco LLC | WV | | |
| Jefferson Compressor Station Expansion Project | Equitrans, L.P. | PA | | |
| Jefferson Davis Electric Cooperative coastal use permit P20070200 pipeline | Jefferson Davis Electric Cooperative, Inc. | LA | | |
| Jefferson Davis Electric Cooperative coastal use permit P20070201 pipeline | Jefferson Davis Electric Cooperative, Inc. | LA | | |
| Jefferson Island Storage & Hub, L.l.c. (jish) coastal use permit P20121211 pipeline | Jefferson Island Storage & Hub, L.l.c. (jish) | LA | | |
| Jeffersons to Cellar CRP Pipeline | Eqt XL Midstream Operating LLC | WV | | |
| Jena Compressor Station Replacement | ANR Pipeline Company | LA | | |
| Jena Compressor Station Replacement (CP23-7) | ANR Pipeline Company | LA | | |
| Jewel Ridge | | VA | | |
| Jewell Ridge Pipeline | East Tennessee Natural Gas, LLC | VA | In service 2006 | |
| Jim Bridger Delivery Project | MountainWest Overthrust Pipeline, LLC | WY | | |
| John W Stone Oil Dis coastal use permit P19960578 pipeline | John W Stone Oil Dis | LA | | |
| John W Stone Oil Dis coastal use permit P19961441 pipeline | John W Stone Oil Dis | LA | | |
| John W Stone Oil Dis coastal use permit P19980477 pipeline | John W Stone Oil Dis | LA | | |
| John W Stone Oil Distributor coastal use permit P20000246 pipeline | John W Stone Oil Distributor LLC | LA | | |
| John W. Stone Oil Distributor coastal use permit P20071560 pipeline | John W Stone Oil Distributor LLC | LA | | |
| John W. Stone Oil Distributor coastal use permit P20150832 pipeline | John W Stone Oil Distributor LLC | LA | | |
| Johnson's Corner Crude Oil Facility- McKenzie Ctny | Tesoro - High Plains Pipeline Company | ND | | |
| Johnson’s Corner Pipeline Project | Noble Midstream | TX | | |
| Joint Pipeline Expansion (SESH) Project | Southeast Supply Header, LLC | LA, MS | In service 2011 | |
| Joliet Booster Compressor Station Project | ANR Pipeline Company | IL | 2025 | |
| Jonah Expansion Project | TEPPCO | WY | | |
| Jones Island Landfill Gas Project | Milwaukee Metropolitan Sewerage | WI | In service 2012 | |
| Jordan Cove LNG Terminal | Jordan Cove Energy Project L.P. | OR | | |
| Journeyman to Furbee Pipeline | Antero Midstream LLC | WV | | |
| Junction Natural Gas Storage Project | CHESTNUT RIDGE STORAGE LLC | PA, WV | | |
| Junction Platform Project | Discovery Gas Transmission LLC | LA | | |
| Jurisdictional Tap Line (JTL) Project | Questar Overthrust Pipeline Company | WY | In service 2016 | |
| K N Interstate Gas Transmission Pony Express | K N Interstate Gas Transmission Corporation | CO, KS, MO, NE, WY | In service 1997 | |