| Nom du Parc | Etat/Ville | Type du Parc |
|---|---|---|
| Belmont-Paul Women's Equality National Monument | Columbia (district) (Washington) | National Monument |
| Sacajawea Historical State Park | Washington (Pasco) | State Park |
| Saddlebag Island Marine State Park | Washington (Anacortes) | State Park |
| Sadlers Creek State Park | Caroline du Sud (Anderson) | State Park |
| Sagamore Hill National Historic Site | New York (Oyster Bay) | National Historic Site |
| Saguaro National Park | Arizona (Tucson) | National Park |
| Sailor's Creek Battlefield State Park | Virginie (Rice) | State Park |
| Saint Croix Island International Historic Site | Maine (Calais) | International Historic Site |
| Saint Croix National Scenic River | Wisconsin (Saint Croix Falls) | National Scenic River |
| Saint Edward State Park | Washington (Kenmore) | State Park |
| Saint Francis Dam Disaster National Monument | Californie (Fillmore) | National Monument |
| Saint Paul's Church National Historic Site | New York (Mount Vernon, NY - 897 South Columbus Avenue) | National Historic Site |
| Saint-Gaudens National Historic Site | New Hampshire (Cornish) | National Historic Site |
| Sakatah Lake State Park | Minnesota (Waterville) | State Park |
| Salem Maritime National Historic Site | Massachusetts (Salem) | National Historic Site |
| Salinas Pueblo Missions National Monument | Nouveau Mexique (Mountainair) | National Monument |
| Salmon Lake State Park | Montana (Missoula) | State Park |
| Salt Fork State Park | Ohio (Lore City) | State Park |
| Salt Plains State Park | Oklahoma (Jet) | State Park |
| Salt River Bay National Historic Park and Ecological Preserve | Vermont (Christiansted) | National Historic Park and Ecological Preserve |
| Salt Rock StatePark | Connecticut (Sprague) | State Park |
| Salt Springs State Park | Pennsylvanie (Montrose) | State Park |
| Saltwater State Park | Washington (Des Moines) | State Park |
| Sam A. Baker State Park | Missouri (Patterson) | State Park |
| Sam Houston Jones State Park | Louisiane (Lake Charles) | State Park |
| Sampson State Park | New York (Romulus) | State Park |
| Samuel P. Taylor State Park | Californie (San Francisco) | State Park |
| Samuel S. Lewis State Park | Pennsylvanie (York) | State Park |
| San Angelo State Park | Texas (San Angelo) | State Park |
| San Antonio Missions National Historical Park | Texas (San Antonio) | National Historical Park |
| San Bruno Mountain State Park | Californie (San Francisco) | State Park |
| San Felasco Hammock Preserve State Park | Floride (Alachua) | State Park |
| San Francisco Maritime National Historical Park | Californie (San Francisco) | National Historical Park |
| San Gabriel Mountains National Monument | Californie (Azusa) | National Monument |
| San Juan Island National Historical Park | Washington (Friday Harbor) | National Historical Park |
| San Juan Islands National Monument | Washington (San Juan Islands) | National Monument |
| San Juan National Historic Site | American Samoa (San Juan) | National Historic Site |
| San Marcos de Apalache Historic State Park | Floride (St. Marks) | State Park |
| San Pedro Underwater Archaeological Preserve State Park | Floride (Islamorada) | State Park |
| Sand Bar State Park | Vermont (Milton) | State Park |
| Sand Bridge State Park | Pennsylvanie (Mifflinburg) | State Park |
| Sand Creek Massacre National Historic Site | Colorado (Kiowa County) | National Historic Site |
| Sand Harbor State Park | Nevada (Incline Village) | State Park |
| Sand Hills State Park | Kansas (Hutchinson) | State Park |
| Sand Hollow State Park | Utah (Hurricane) | State Park |
| Sand to Snow National Monument | Californie (Cabazon) | National Monument |
| Sandy Island Beach State Park | New York (Pulaski) | State Park |
| Sandy Point State Park | Maryland (Annapolis) | State Park |
| Sang Run State Park | Maryland (McHenry) | State Park |
| Sanilac Petroglyphs Historic State Park | Michigan (Cass City) | State Park |
| Santa Fe National Historic Trail | Nouveau Mexique (Du Colorado à l'Oklahoma) | National Historic Trail |
| Santa Monica Mountains National Recreation Area | Californie (Thousand Oaks) | National Recreation Area |
| Santa Rosa and San Jacinto Mountains National Monument | Californie ( Palm Springs) | National Monument |
| Santa Rosa Lake State Park | Nouveau Mexique (Santa Rosa) | State Park |
| Santee State Park | Caroline du Sud (Santee) | State Park |
| Saratoga National Historical Park | New York (Stillwater) | National Historical Park |
| Saratoga Spa State Park | New York (Saratoga Springs) | State Park |
| Saugatuck Dunes State Park | Michigan (Saugatuck Dunes) | State Park |
| Saugus Iron Works National Historic Site | Massachusetts (Saugus) | National Historic Site |
| Savage Gulf State Park | Tennessee (Beersheba Springs) | State Park |
| Savanna Portage State Park | Minnesota (McGregor) | State Park |
| Savannas Preserve State Park | Floride (Port St. Lucie ) | State Park |
| Scantic River State Park | Connecticut (Enfield) | State Park |
| Scenic Beach State Park | Washington (Seabeck) | State Park |
| Scenic State Park | Minnesota (Bigfork) | State Park |
| Schafer State Park | Washington (Elma) | State Park |
| Schodack Island State Park | New York (Schodack Landing) | State Park |
| Schoolcraft State Park | Minnesota (Deer River) | State Park |
| Schunnemunk State Park | New York (Orange County) | State Park |
| Scioto Trail State Park | Ohio (Chillicothe) | State Park |
| Scofield State Park | Utah (Price) | State Park |
| Scotts Bluff National Monument | Nebraska (Gering) | National Monument |
| Sea Rim State Park | Texas (Sabine Pass) | State Park |
| Seabranch Preserve State Park | Floride (Stuart) | State Park |
| Seaquest State Park | Washington (Castle Rock) | State Park |
| Sebago Cabin Camp - Harriman State Park | New York (Harriman State Park) | State Park |
| Sebago Lake State Park | Maine (Naples) | State Park |
| Sebastian Inlet State Park | Floride (Melbourne Beach) | State Park |
| Selden Neck State Park | Connecticut (Lyme) | State Park |
| Selkirk Shores State Park | New York (Pulaski) | State Park |
| Selma To Montgomery National Historic Trail | Alabama (Montgomery, Lowndes & Dallas Counties) | National Historic Trail |
| Seminoe State Park | Wyoming (Sinclair) | State Park |
| Seminole Canyon State Park & Historic Site | Texas (Comstock) | State Park |
| Seminole State Park | Georgie (Donalsonville) | State Park |
| Seneca Creek State Park | Maryland (Gaithersburg) | State Park |
| Seneca Lake State Park | New York (Geneva) | State Park |
| Sequim Bay State Park | Washington (Sequim) | State Park |
| Sequoia National Park Kings Canyon National Park | Californie (Three Rivers) | National Park |
| Sequoyah Bay State Park | Oklahoma (Wagoner) | State Park |
| Sequoyah State Park | Oklahoma (Hulbert) | State Park |
| Sesquicentennial State Park | Caroline du Sud (Columbia) | State Park |
| Seven Bends State Park | Virginie (Woodstock) | State Park |
| Seven Lakes State Park | Michigan (Holly) | State Park |
| Seyon Lodge State Park | Vermont (Groton) | State Park |
| Shabbona Lake State Park | Illinois (Shabbona) | State Park |
| Shades State Park | Indiana (Waveland) | State Park |
| Shadmoor State Park | New York (Montauk) | State Park |
| Shakamak State Park | Indiana (Jasonville) | State Park |
| Shawnee State Park | Ohio (West Portsmouth) | State Park |
| Shawnee State Park | Pennsylvanie (Schellsburg) | State Park |
| Sheldon Lake State Park & Environmental Learning Center | Texas (Houston) | State Park |
| Shenandoah National Park | Virginie (The Blue Ridge Mountains près de Luray) | National Park |
| Shepard State Park | Mississippi (Gautier) | State Park |
| Sherwood Island State Park | Connecticut (Westport) | State Park |
| Shikellamy State Park | Pennsylvanie (Sunbury) | State Park |
| Shiloh National Cemetery | Tennessee (National Cemetery) | National Cemetery |
| Shiloh National Military Park | Tennessee (Shiloh) | National Military Park |
| Shine Tidelands State Park | Washington (Port Ludlow) | State Park |
| Shirley Chisholm State Park | New York (Brooklyn) | State Park |
| Shore Acres State Park | Oregon (Coos Bay) | State Park |
| Shot Tower State Park | Virginie (Max Meadows) | State Park |
| Shuyak Island State Park | Alaska (Aleneva) | State Park |
| Sibley State Park | Minnesota (New London) | State Park |
| Sica Hollow State Park | Dakota du Sud (Sisseton) | State Park |
| Sideling Hill Creek State Park | Maryland (Hancock) | State Park |
| Siloam Springs State Park | Illinois (Clayton) | State Park |
| Silver Falls State Park | Oregon (Salem) | State Park |
| Silver Lake State Park | Michigan (Mears) | State Park |
| Silver Lake State Park | New Hampshire (Hollis) | State Park |
| Silver Lake State Park | New York (Castile) | State Park |
| Silver Lake State Park | Vermont (Barnard) | State Park |
| Silver Mine - Harriman State Park | New York (Bear Mountain) | State Park |
| Silver Sands State Park | Connecticut (Milford) | State Park |
| Silver Springs State Park | Floride (Ocala) | State Park |
| Simon B. Elliott State Park | Pennsylvanie (Penfield) | State Park |
| Singletary Lake State Park | Caroline du Nord (Kelly) | State Park |
| Sinks Canyon State Park | Wyoming (Lander) | State Park |
| Sinkyone Wilderness State Park | Californie (Fort Bragg) | State Park |
| Sinnemahoning State Park | Pennsylvanie (Austin) | State Park |
| Sitka National Historical Park | Alaska (Sitka) | National Historical Park |
| Sizerville State Park | Pennsylvanie (Emporium) | State Park |
| Skagit Island Marine State Park | Washington (Skagit Island) | State Park |
| Skidaway Island State Park | Georgie (Savannah) | State Park |
| Sky Meadows State Park | Virginie (Delaplane) | State Park |
| Skyway Fishing Pier State Park | Floride (St. Petersburg) | State Park |
| Sleeper State Park | Michigan (Caseville) | State Park |
| Sleeping Bear Dunes National Lakeshore | Michigan (Empire) | National Lakeshore |
| Sleeping Giant State Park | Connecticut (Hamden) | State Park |
| Sleepy Hollow State Park | Michigan (Laingsburg) | State Park |
| Slide Rock State Park | Arizona (Sedona) | State Park |
| Sluice Boxes State Park | Montana (Great Falls) | State Park |
| Smallwood State Park | Maryland (Marbury) | State Park |
| Smith Falls State Park | Nebraska (Valentine) | State Park |
| Smith Mountain Lake State Park | Virginie (Huddleston) | State Park |
| Smith River State Park | Montana (Great Falls) | State Park |
| Smith Rock State Park | Oregon (Bend) | State Park |
| Smithgall Woods State Park | Georgie (Helen) | State Park |
| Smugglers’ Notch State Park | Vermont (Stowe) | State Park |
| Snake Den State Park | Rhode Island (Johnston) | State Park |
| Snow Canyon State Park | Utah (Ivins) | State Park |
| Sojourner Truth State Park | New York (Kingston) | State Park |
| Sonoma Coast State Park | Californie (Jenner) | State Park |
| Sonoran Desert National Monument | Arizona (Phoenix) | National Monument |
| South Bass Island State Park | Ohio (South Bass Island) | State Park |
| South Beach State Park | Oregon (Newport) | State Park |
| South Cumberland State Park | Tennessee (Monteagle) | State Park |
| South Higgins Lake State Park | Michigan (Roscommon) | State Park |
| South Llano River State Park | Texas (Junction) | State Park |
| South Mountain State Park | Maryland (Boonsboro) | State Park |
| South Mountains State Park | Caroline du Nord (Morganton) | State Park |
| South Shore State Park | Illinois (Carlyle) | State Park |
| South Toledo Bend State Park | Louisiane (Anacoco) | State Park |
| South Whidbey State Park | Washington (Freeland) | State Park |
| South Yuba River State Park | Californie (Nevada City) | State Park |
| Southford Falls State Park | Connecticut (Southbury) | State Park |
| Southwick Beach State Park | New York (Henderson) | State Park |
| Spencer Spit State Park | Washington (Lopez Island) | State Park |
| Spinney Mountain State Park | Colorado (Hartsel) | State Park |
| Split Rock Creek State Park | Minnesota (Jasper) | State Park |
| Split Rock Lighthouse State Park | Minnesota (Two Harbors) | State Park |
| Spring Creek Hatchery State Park | Washington (Underwood) | State Park |
| Spring Meadow Lake State Park | Montana (Helena) | State Park |
| Spring Mill State Park | Indiana (Mitchell) | State Park |
| Spring Mountain Ranch State Park | Nevada (Blue Diamond) | State Park |
| Spring Valley State Park | Nevada (Pioche) | State Park |
| Springbrook State Park | Iowa (Guthrie Center) | State Park |
| Springfield Armory National Historic Site | Massachusetts (Springfield) | National Historic Site |
| Squak Mountain State Park | Washington (Issaquah) | State Park |
| Squantz Pond State Park | Connecticut (New Fairfield) | State Park |
| Squilchuck State Park | Washington (Wenatchee) | State Park |
| St. Andrews State Park | Floride (Panama City) | State Park |
| St. Bernard State Park | Louisiane (Braithwaite) | State Park |
| St. Clement's Island State Park | Maryland (Scotland) | State Park |
| St. Croix State Park | Minnesota (Hinckley) | State Park |
| St. Francois State Park | Missouri (Bonne Terre) | State Park |
| St. Joe State Park | Missouri (Park Hills) | State Park |
| St. Lucie Inlet Preserve State Park | Floride (Port Salerno) | State Park |
| St. Marks River Preserve State Park | Floride (Tallahassee) | State Park |
| St. Mary's River State Park | Maryland (Scotland) | State Park |
| St. Sebastian River Preserve State Park | Floride (Fellsmere) | State Park |
| St. Vrain State Park | Colorado (Boulder) | State Park |
| Stagecoach State Park | Colorado (Oak Creek) | State Park |
| Standing Boy Creek State Park | Georgie (Columbus) | State Park |
| Standing Stone State Park | Tennessee (Hilham) | State Park |
| Starvation Creek State Park | Oregon (Hood River) | State Park |
| Starved Rock State Park | Illinois (Utica) | State Park |
| State Capitol State Park | Oregon (Salem) | State Park |
| State Forest State Park | Colorado (Walden) | State Park |
| Statue Of Liberty National Monument | New York (New York) | National Monument |
| Staunton River Battlefield State Park | Virginie (Randolph) | State Park |
| Staunton River State Park | Virginie (Scottsburg) | State Park |
| Staunton State Park | Colorado (Green Valley) | State Park |
| Steamboat Lake State Park | Colorado (Steamboat Springs) | State Park |
| Steamboat Rock State Park | Washington (Electric City) | State Park |
| Steamtown National Historic Site | Pennsylvanie (Scranton) | National Historic Site |
| Steinaker State Park | Utah (Vernal) | State Park |
| Stephen C. Foster State Park | Georgie (Fargo) | State Park |
| Stephen F. Austin State Park | Texas (San Felipe) | State Park |
| Stephen Foster Folk Culture Center State Park | Floride (White Springs) | State Park |
| Stephens State Park | New Jersey (Hackettstown) | State Park |
| Sterling Forest State Park | New York (Tuxedo) | State Park |
| Sterling State Park | Michigan (Monroe) | State Park |
| Stillwater Pond State Park | Connecticut (Torrington) | State Park |
| Stillwater State Park | Vermont (Groton) | State Park |
| Stockton State Park | Missouri (Dadeville) | State Park |
| Stoddard Hill State Park | Connecticut (Ledyard) | State Park |
| Stone Hut State Park | Vermont (Stowe) | State Park |
| Stone State Park | Iowa (Sioux City) | State Park |
| Stonelick State Park | Ohio (Pleasant Plain) | State Park |
| Stones River National Battlefield | Tennessee (Murfreesboro) | National Battlefield |
| Stones River National Cemetery | Tennessee (Murfreesboro) | National Cemetery |
| Stonewall National Monument | New York (New York) | National Monument |
| Stonewall Resort State Park | Virginie-Occidentale (Roanoke) | State Park |
| Stony Brook State Park | New York (Dansville) | State Park |
| Storm King State Park | New York (Cornwall-on-Hudson) | State Park |
| Storrie Lake State Park | Nouveau Mexique (Las Vegas) | State Park |
| Straight Lake State Park | Wisconsin (Luck) | State Park |
| Straits State Park | Michigan (St. Ignace) | State Park |
| Stratton Brook State Park | Connecticut (Simsbury) | State Park |
| Strouds Run State Park | Ohio (Athens) | State Park |
| Stuart Island Marine State Park | Washington (Friday Harbor) | State Park |
| Stump Pass Beach State Park | Floride (Englewood) | State Park |
| Sturgeon Point State Park | Michigan (Harrisville) | State Park |
| Sucia Island Marine State Park | Washington (Eastsound) | State Park |
| Sue-meg State Park | Californie (Trinidad) | State Park |
| Sugarite Canyon State Park | Nouveau Mexique (Raton) | State Park |
| Sugarloaf Ridge State Park | Californie (Kenwood) | State Park |
| Suitland Parkway | Maryland (Prince Georges County) | Parkway |
| Sully Creek State Park | Dakota du Nord (Medora) | State Park |
| Summit Lake State Park | Indiana (New Castle) | State Park |
| Sumner Lake State Park | Nouveau Mexique (Sumner Lake) | State Park |
| Sun Lakes-Dry Falls State Park | Washington (Coulee City) | State Park |
| Sunken Meadow State Park (Governor Alfred E. Smith) | New York (Kings Park) | State Park |
| Sunnybrook State Park | Connecticut (Torrington) | State Park |
| Sunrise State Park | Connecticut (Moodus) | State Park |
| Sunset Bay State Park | Oregon (Coos Bay) | State Park |
| Sunset Crater Volcano National Monument | Arizona (Flagstaff) | National Monument |
| Susquehanna Riverlands State Park | Pennsylvanie (York) | State Park |
| Susquehanna State Park | Maryland (Havre de Grace) | State Park |
| Susquehanna State Park | Pennsylvanie (Williamsport) | State Park |
| Susquehannock State Park | Pennsylvanie (Drumore) | State Park |
| Sutter Buttes State Park | Californie (Yuba City) | State Park |
| Suwannee River State Park | Floride (Live Oak) | State Park |
| Swallow Falls State Park | Maryland (Oakland) | State Park |
| Swan Lake State Park | Maine (Swanville) | State Park |
| Swartswood State Park | New Jersey (Newton) | State Park |
| Swatara State Park | Pennsylvanie (Pine Grove) | State Park |
| Sweetwater Creek State Park | Georgie (Lithia Springs) | State Park |
| Sweetwater Lake State Park | Colorado (Glenwood Springs) | State Park |
| Sweitzer Lake State Park | Colorado (Delta) | State Park |
| Sycamore State Park | Ohio (Trotwood) | State Park |
| Sylvan Lake State Park | Colorado (Eagle) | State Park |
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