| Nom du Parc | Etat/Ville | Type du Parc |
| James A Garfield National Historic Site | Ohio (Mentor) | National Historic Site |
| Jamestown National Historic Site | Virginie (James City County) | National Historic Site |
| Jean Lafitte National Historical Park and Preserve | Louisiane (New Orleans) | National Historical Park and Preserve |
| Jefferson National Expansion Memorial | Missouri (St. Louis) | National Expansion Memorial |
| Jewel Cave National Monument | Dakota du Sud (Custer) | National Monument |
| Jimmy Carter National Historic Site | Georgie (Plains) | National Historic Site |
| John D Rockefeller Jr Memorial Parkway | Wyoming (Moose) | Memorial Parkway |
| John Day Fossil Beds National Monument | Oregon (Kimberly) | National Monument |
| John Ericsson National Memorial | Columbia (district) (National Mall) | National Memorial |
| John F Kennedy National Historic Site | Massachusetts (Brookline) | National Historic Site |
| John Muir National Historic Site | Californie (Martinez) | National Historic Site |
| Johnstown Flood National Memorial | Pennsylvanie (South Fork) | National Memorial |
| Joshua Tree National Park | Californie (Twentynine Palms) | National Park |
| Juan Bautista de Anza National Historic Trail | Arizona (Nogales en Arizona jusqu'à San Francisco Californie) | National Historic Trail |
