| Nom du Parc | Etat/Ville | Type du Parc |
|---|---|---|
| Pacheco State Park | Californie (Gilroy) | State Park |
| Pacific Beach State Park | Washington (Pacific Beach) | State Park |
| Pacific Pines State Park | Washington (Ocean Park) | State Park |
| Pacific Remote Islands Marine National Monument | Hawaii (Honolulu) | National Monument |
| Padre Island National Seashore | Texas (Corpus Christi) | National Seashore |
| Paint Creek State Park | Ohio (Bainbridge) | State Park |
| Painted desert | Arizona (Holbrook) | Désert |
| Painted Rocks State Park | Montana (Lolo) | State Park |
| Paintsville Lake State Park | Kentucky (Staffordsville) | State Park |
| Palaʻau State Park | Hawaii (Molokai, Kualapuu) | State Park |
| Palisade State Park | Utah (Sterling) | State Park |
| Palisades State Park | Dakota du Sud (Garretson) | State Park |
| Palisades-Kepler State Park | Iowa (Mount Vernon) | State Park |
| Palmer State Park | Maryland (Street) | State Park |
| Palmetto Island State Park | Louisiane (Abbeville) | State Park |
| Palmetto State Park | Texas (Gonzales) | State Park |
| Palms Book State Park | Michigan (Manistique) | State Park |
| Palo Alto Battlefield National Historic Site | Texas (Brownsville) | National Historic Site |
| Palo Duro Canyon State Park | Texas (Canyon) | State Park |
| Palo Pinto Mountains State Park | Texas (Strawn) | State Park |
| Palomar Mountain State Park | Californie (Rincon) | State Park |
| Pancho Villa State Park | Nouveau Mexique (Columbus) | State Park |
| Panola Mountain State Park | Georgie (Stockbridge) | State Park |
| Panther Creek State Park | Tennessee (Morristown) | State Park |
| Paonia State Park | Colorado (Somerset) | State Park |
| Papahānaumokuākea Marine National Monument | Hawaii (Honolulu) | National Monument |
| Paradise Point State Park | Washington (Ridgefield) | State Park |
| Paris Landing State Park | Tennessee (Buchanan) | State Park |
| Paris Mountain State Park | Caroline du Sud (Greenville) | State Park |
| Parker Dam State Park | Pennsylvanie (Penfield) | State Park |
| Parkin Archeological State Park | Arkansas (Parkin) | State Park |
| Parvin State Park | New Jersey (Pittsgrove) | State Park |
| Patagonia Lake State Park | Arizona (Patagonia) | State Park |
| Patapsco Valley State Park | Maryland (Ellicott City) | State Park |
| Patos Island Marine State Park | Washington (Eastsound) | State Park |
| Patterson State Park | Pennsylvanie (Coudersport) | State Park |
| Pattison State Park | Wisconsin (Superior) | State Park |
| Patuxent River State Park | Maryland (Gaithersburg) | State Park |
| Paul B. Johnson State Park | Mississippi (Hattiesburg) | State Park |
| Paul Grist State Park | Alabama (Plantersville) | State Park |
| Pawtuckaway State Park | New Hampshire (Nottingham) | State Park |
| Paynes Creek Historic State Park | Floride (Bowling Green) | State Park |
| Paynes Prairie Preserve State Park | Floride (Micanopy) | State Park |
| Pea Ridge National Military Park | Arkansas (Pea Ridge) | National Military Park |
| Peace Arch Historical State Park | Washington (Blaine) | State Park |
| Peaks-Kenny State Park | Maine (Dover-Foxcroft) | State Park |
| Pearl Hill State Park | Massachusetts (West Townsend) | State Park |
| Pearl Lake State Park | Colorado (Steamboat Springs) | State Park |
| Pearrygin Lake State Park | Washington (Winthrop) | State Park |
| Pecos Canyon State Park | Nouveau Mexique (Tererro) | State Park |
| Pecos National Historical Park | Nouveau Mexique (Pecos) | National Historical Park |
| Pedernales Falls State Park | Texas (Johnson City) | State Park |
| Peebles Island State Park | New York (Cohoes) | State Park |
| Peirce Mill | Columbia (district) (Washington) | |
| Peninsula State Park | Wisconsin (Fish Creek) | State Park |
| Penn-Roosevelt State Park | Pennsylvanie (Huntingdon) | State Park |
| Pennsylvania Avenue National Historic Site | Columbia (district) (Washington) | National Historic Site |
| Penrose Point State Park | Washington (Lakebay) | State Park |
| Penwood State Park | Connecticut (Avon) | State Park |
| Percha Dam State Park | Nouveau Mexique (Caballo) | State Park |
| Percy Quin State Park | Mississippi (McComb) | State Park |
| Perdido Key State Park | Floride (Pensacola) | State Park |
| Pere Marquette State Park | Illinois (Grafton) | State Park |
| Perrot State Park | Wisconsin (Trempealeau) | State Park |
| Perry State Park | Kansas (Topeka) | State Park |
| Perry's Victory & International Peace Memorial | Ohio (Put-in-Bay) | Memorial |
| Pershing State Park | Missouri (Laclede) | State Park |
| Peshastin Pinnacles State Park | Washington (Dryden) | State Park |
| Petersburg National Battlefield | Virginie (Petersburg) | National Battlefield |
| Petit Jean State Park | Arkansas (Oppelo) | State Park |
| Petoskey State Park | Michigan (Petoskey) | State Park |
| Petrified Forest National Park | Arizona (Holbrook) | National Park |
| Petroglyph National Monument | Nouveau Mexique (Albuquerque) | National Monument |
| Pettigrew State Park | Caroline du Nord (Creswell) | State Park |
| Pfeiffer Big Sur State Park | Californie (Big Sur) | State Park |
| Picacho Peak State Park | Arizona (Red Rock) | State Park |
| Pickett CCC Memorial State Park | Tennessee (Jamestown) | State Park |
| Pickwick Landing State Park | Tennessee (Counce) | State Park |
| Pictograph Cave State Park | Montana (Billings) | State Park |
| Pictured Rocks National Lakeshore | Michigan (Munising) | National Lakeshore |
| Pigeon Swamp State Park | New Jersey (Manalapan) | State Park |
| Pike Lake State Park | Ohio (Bainbridge) | State Park |
| Pikes Peak State Park | Iowa (McGregor) | State Park |
| Pikes Point State Park | Iowa (Milford) | State Park |
| Pilgrim Memorial State Park | Massachusetts (Plymouth) | State Park |
| Pillsbury State Park | New Hampshire (Washington) | State Park |
| Pilot Knob State Park | Iowa (Forest City) | State Park |
| Pilot Mountain State Park | Caroline du Nord (Pinnacle) | State Park |
| Pine Grove Furnace State Park | Pennsylvanie (Gardners) | State Park |
| Pine Lake State Park | Iowa (Eldora) | State Park |
| Pinnacle Mountain State Park | Arkansas (Crystal Hill) | State Park |
| Pinnacle Rock State Park | Virginie-Occidentale (Bramwell) | State Park |
| Pinnacles National Park | Californie (Paicines) | National Park |
| Pipe Spring National Monument | Arizona (Fredonia) | National Monument |
| Pipestem Resort State Park | Virginie-Occidentale (Pipestem) | State Park |
| Pipestone National Monument | Minnesota (Pipestone) | National Monument |
| Pirogue Island State Park | Montana (Miles City) | State Park |
| Piscataway Park | Maryland (Accokeek) | Park |
| Pisgah State Park | New Hampshire (Winchester) | State Park |
| Piute State Park | Utah (Antimony) | State Park |
| Pixley Falls State Park | New York (Boonville) | State Park |
| Placerita Canyon State Park | Californie (Santa Clarita) | State Park |
| Placid Lake State Park | Montana (Missoula) | State Park |
| Platt Hill State Park | Connecticut (Winchester) | State Park |
| Platte River State Park | Nebraska (Louisville) | State Park |
| Plum Bayou Mounds Archeological State Park | Arkansas (Little Rock) | State Park |
| Plumas-Eureka State Park | Californie (Truckee) | State Park |
| Pocahontas State Park | Virginie (Chesterfield) | State Park |
| Pocomoke River State Park | Maryland (Snow Hill) | State Park |
| Poe Paddy State Park | Pennsylvanie (Woodward) | State Park |
| Poinsett State Park | Caroline du Sud (Wedgefield) | State Park |
| Point Au Roche State Park | New York (Plattsburgh) | State Park |
| Point Bridget State Park | Alaska (St Terese) | State Park |
| Point Lookout State Park | Maryland (Scotland) | State Park |
| Point Mugu State Park | Californie (Santa Clarita) | State Park |
| Point Reyes National Seashore | Californie (Point Reyes) | National Seashore |
| Point State Park | Pennsylvanie (Pittsburgh) | State Park |
| Poison Springs Battleground State Park | Arkansas (Chidester) | State Park |
| Pokagon State Park/Trine State Recreation Area | Indiana (Angola) | State Park |
| Polihale State Park | Hawaii (Kauaʻi, Kekaha) | State Park |
| Pomeroy State Park | Connecticut (Lebanon) | State Park |
| Pomme de Terre State Park | Missouri (Pittsburg) | State Park |
| Pomona State Park | Kansas (Pomona) | State Park |
| Pompeys Pillar National Monument | Montana (Billings) | National Monument |
| Ponca State Park | Nebraska (Ponca) | State Park |
| Ponce de Leon Springs State Park | Floride (Ponce de Leon) | State Park |
| Ponderosa State Park | Idaho (McCall) | State Park |
| Pony Express National Historic Trail | American Samoa (Californie, Colorado, Kansas etc...) | National Historic Trail |
| Popham Beach State Park | Maine (Small Point) | State Park |
| Poplar Grove National Cemetery | Virginie (Petersburg) | National Cemetery |
| Porcupine Mountains Wilderness State Park | Michigan (Ontonagon) | State Park |
| Port Chicago Naval Magazine National Memorial | Californie (Concord Naval Weapons Station) | National Memorial |
| Port Crescent State Park | Michigan (Port Austin) | State Park |
| Port Orford Heads State Park | Oregon (Port Orford) | State Park |
| Portage Lakes State Park | Ohio (Akron) | State Park |
| Portola Redwoods State Park | Californie (San Francisco) | State Park |
| Posey Island Marine State Park | Washington (Friday Harbor) | State Park |
| Possum Kingdom State Park | Texas (Caddo) | State Park |
| Potato Creek State Park | Indiana (North Liberty) | State Park |
| Potawatomi State Park | Wisconsin (Sturgeon Bay) | State Park |
| Potholes State Park | Washington (Othello) | State Park |
| Potlatch State Park | Washington (Shelton) | State Park |
| Potomac Heritage National Scenic Trail | American Samoa (Shelton) | National Scenic Trail |
| Poverty Point National Monument | Louisiane (Epps) | National Monument |
| Poverty Point National Monument | Louisiane (Epps) | National Monument |
| Poverty Point Reservoir State Park | Louisiane (Delhi) | State Park |
| Powhatan Historic State Park | Arkansas (Black Rock) | State Park |
| Powhatan State Park | Virginie (Powhatan) | State Park |
| Prairie Creek Redwoods State Park | Californie (Crescent City) | State Park |
| Prairie Dog State Park | Kansas (Norton) | State Park |
| Prairie Grove Battlefield State Park | Arkansas (Prairie Grove) | State Park |
| Prairie Rose State Park | Iowa (Harlan) | State Park |
| Prairie Spirit Trail State Park | Kansas (Garnett) | State Park |
| Prairie State Park | Missouri (Mindenmines) | State Park |
| Prehistoric Trackways National Monument | Nouveau Mexique (Las Cruces) | National Monument |
| Preparation Canyon State Park | Iowa (Pisgah) | State Park |
| President Lincoln and Soldiers’ Home National Monument | Columbia (district) (Washington DC) | National Monument |
| President's Park (White House) | Columbia (district) (Washington) | |
| Presidio of San Francisco | Californie (San Francisco) | |
| Presque Isle State Park | Pennsylvanie (Erie) | State Park |
| Price's Scrub State Park | Floride (Micanopy) | State Park |
| Prickett’s Fort State Park | Virginie-Occidentale (Fairmont) | State Park |
| Priest Lake State Park | Idaho (Coolin) | State Park |
| Prince Gallitzin State Park | Pennsylvanie (Patton) | State Park |
| Prince William Forest Park | Virginie (Washington D.C) | Park |
| Princeton Battlefield State Park | New Jersey (Princeton) | State Park |
| Prineville Reservoir State Park | Oregon (Bend) | State Park |
| Promised Land State Park | Pennsylvanie (Greentown) | State Park |
| Prompton State Park | Pennsylvanie (Prompton) | State Park |
| Prophetstown State Park | Indiana (West Lafayette) | State Park |
| Prouty Place State Park | Pennsylvanie (Austin) | State Park |
| Pu`uhonua O Honaunau National Historical Park | Hawaii (Honaunau) | National Historical Park |
| Pumpkin Hill Creek Preserve State Park | Floride (Jacksonville) | State Park |
| Punderson State Park | Ohio (Newbury) | State Park |
| Purtis Creek State Park | Texas (Eustace) | State Park |
| Putnam Memorial State Park | Connecticut (Redding) | State Park |
| Puukohola Heiau National Historic Site | Hawaii (Kawaihae) | National Historic Site |
| Pymatuning State Park | Ohio (Andover) | State Park |
| Pymatuning State Park | Pennsylvanie (Jamestown) | State Park |
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