| State | Visited | Bold indicates national parks. |
| Alabama | | Birmingham Civil Rights National Monument |
| | | Freedom Riders National Monument |
| | | Horseshoe Bend National Military Park |
| | | Little River Canyon National Preserve |
| | | Natchez Trace National Scenic Trail |
| | | Natchez Trace Parkway |
| | | Russell Cave National Monument |
| | | Tuskegee Airmen National Historic Site |
| | | Tuskegee Institute National Historic Site |
| Alaska | | Alagnak Wild River |
| | | Aniakchak National Monument and Preserve |
| | | Bering Land Bridge National Preserve |
| | | Cape Krusenstern National Monument |
| | X | Denali National Park and Preserve |
| | X | Gates of the Arctic National Park and Preserve |
| | | Glacier Bay National Park and Preserve |
| | | Katmai National Park and Preserve |
| | X | Kenai Fjords National Park |
| | X | Klondike Gold Rush National Historical Park |
| | | Kobuk Valley National Park |
| | | Lake Clark National Park and Preserve |
| | | Noatak National Preserve |
| | | Sitka National Historical Park |
| | X | Wrangell-St. Elias National Park and Preserve |
| | | Yukon-Charley Rivers National Preserve |
| American Samoa | | National Park of American Samoa |
| Arizona | | Canyon De Chelly National Monument |
| | X | Casa Grande Ruins National Monument |
| | | Chiricahua National Monument |
| | | Coronado National Memorial |
| | X | Fort Bowie National Historic Site |
| | | Glen Canyon National Recreation Area |
| | X | Grand Canyon National Park |
| | | Hohokam Pima National Monument |
| | | Hubbell Trading Post National Historic Site |
| | | Lake Mead National Recreation Area |
| | | Montezuma Castle National Monument |
| | | Navajo National Monument |
| | | Organ Pipe Cactus National Monument |
| | X | Petrified Forest National Park |
| | | Pipe Spring National Monument |
| | X | Saguaro National Park |
| | | Sunset Crater Volcano National Monument |
| | | Tonto National Monument |
| | | Tumacacori National Historical Park |
| | | Tuzigoot National Monument |
| | | Walnut Canyon National Monument |
| | | Wupatki National Monument |
| Arkansas | | Arkansas Post National Memorial |
| | X | Buffalo National River |
| | X | Fort Smith National Historic Site |
| | X | Hot Springs National Park |
| | X | Little Rock Central High School National Historic Site |
| | | Pea Ridge National Military Park |
| | | President William Jefferson Clinton Birthplace Home National Historic Site |
| California | | Cabrillo National Monument |
| | | Castle Mountains National Monument |
| | | César E. Chávez National Monument |
| | X | Channel Islands National Park |
| | | Death Valley National Park |
| | | Devils Postpile National Monument |
| | | Eugene O’Neill National Historic Site |
| | | Fort Point National Historic Site |
| | | Golden Gate National Recreation Area |
| | | John Muir National Historic Site |
| | X | Joshua Tree National Park |
| | | Kings Canyon National Park |
| | | Lassen Volcanic National Park |
| | | Lava Beds National Monument |
| | | Manzanar National Historic Site |
| | | Mojave National Preserve |
| | | Muir Woods National Monument |
| | | Pinnacles National Park |
| | | Point Reyes National Seashore |
| | | Port Chicago Naval Magazine National Memorial |
| | | Redwood National Park |
| | | Rosie the Riveter World War II Home Front National Historical Park |
| | | San Francisco Maritime National Historical Park |
| | | Santa Monica Mountains National Recreation Area |
| | | Sequoia National Park |
| | | Tule Lake National Monument |
| | | Whiskeytown-Shasta-Trinity National Recreation Area |
| | | Yosemite National Park |
| Colorado | | Amache National Historic Site |
| | | Bent’s Old Fort National Historic Site |
| | | Black Canyon of the Gunnison National Park |
| | | Colorado National Monument |
| | | Curecanti National Recreation Area |
| | | Dinosaur National Monument |
| | | Florissant Fossil Beds National Monument |
| | | Great Sand Dunes National Park and Preserve |
| | | Hovenweep National Monument |
| | | Mesa Verde National Park |
| | X | Rocky Mountain National Park |
| | | Sand Creek Massacre National Historic Site |
| | | Yucca House National Monument |
| Connecticut | | New England National Scenic Trail |
| | | Weir Farm National Historical Park |
| Delaware | | First State National Historical Park |
| District of Columbia | | Belmont-Paul Women’s Equality National Monument |
| | | Carter G. Woodson Home National Historic Site |
| | | Chesapeake and Ohio Canal National Historical Park |
| | | Constitution Gardens |
| | | Dwight D. Eisenhower Memorial |
| | | Ford’s Theatre National Historic Site |
| | | Franklin D. Roosevelt Memorial |
| | | Frederick Douglass National Historic Site |
| | | George Washington Memorial Parkway |
| | | Jefferson Memorial |
| | | Korean War Veterans Memorial |
| | | Lincoln Memorial |
| | | Lyndon Baines Johnson Memorial Grove on the Potomac |
| | | Martin Luther King, Jr. Memorial |
| | | Mary McLeod Bethune Council House National Historic Site |
| | | National Capital Parks-East |
| | | National Mall and Memorial Parks |
| | | Pennsylvania Avenue National Historic Site |
| | | Potomac Heritage National Scenic Trail |
| | | Rock Creek Park |
| | | Theodore Roosevelt Island |
| | | Vietnam Veterans Memorial |
| | | Washington Monument |
| | | White House and President’s Park |
| | | World War I Memorial |
| | | World War II Memorial |
| Florida | X | Big Cypress National Preserve |
| | X | Biscayne National Park |
| | X | Canaveral National Seashore |
| | X | Castillo de San Marcos National Monument |
| | | De Soto National Memorial |
| | | Dry Tortugas National Park |
| | X | Everglades National Park |
| | | Fort Caroline National Memorial |
| | X | Fort Matanzas National Monument |
| | X | Gulf Islands National Seashore |
| | | Timucuan Ecological and Historic Preserve |
| Georgia | | Andersonville National Historic Site |
| | | Chattahoochee River National Recreation Area |
| | | Chickamauga & Chattanooga National Military Park |
| | | Cumberland Island National Seashore |
| | | Fort Frederica National Monument |
| | X | Fort Pulaski National Monument |
| | | Jimmy Carter National Historical Park |
| | | Kennesaw Mountain National Battlefield Park |
| | | Martin Luther King Jr. National Historical Park |
| | | Ocmulgee Mounds National Historical Park |
| Guam | | War in the Pacific National Historical Park |
| Hawaii | | Haleakala National Park |
| | | Hawaii Volcanoes National Park |
| | | Honouliuli National Historic Site |
| | | Kalaupapa National Historical Park |
| | | Kaloko-Honokohau National Historical Park |
| | | Pearl Harbor National Memorial |
| | | Pu’uhonua O Honaunau National Historical Park |
| | | Pu’ukohola Heiau National Historic Site |
| Idaho | | City of Rocks National Reserve |
| | | Craters of the Moon National Monument and Preserve |
| | | Hagerman Fossil Beds National Monument |
| | | Minidoka National Historic Site |
| | | Nez Perce National Historical Park |
| | X | Yellowstone National Park |
| Illinois | | Emmett Till and Mamie Till-Mobley National Monument |
| | X | Lincoln Home National Historic Site |
| | | New Philadelphia National Historic Site |
| | | Pullman National Historical Park |
| | X | Springfield 1908 Race Riot National Monument |
| Indiana | | George Rogers Clark National Historical Park |
| | X | Indiana Dunes National Park |
| | | Lincoln Boyhood National Memorial |
| Iowa | X | Effigy Mounds National Monument |
| | | Herbert Hoover National Historic Site |
| Kansas | | Brown v. Board of Education National Historical Park |
| | | Fort Larned National Historic Site |
| | X | Fort Scott National Historic Site |
| | X | Nicodemus National Historic Site |
| | X | Tallgrass Prairie National Preserve |
| Kentucky | X | Abraham Lincoln Birthplace National Historical Park |
| | | Big South Fork National River and Recreation Area |
| | | Camp Nelson National Monument |
| | X | Cumberland Gap National Historical Park |
| | X | Fort Donelson National Battlefield |
| | X | Mammoth Cave National Park |
| | | Mill Springs Battlefield National Monument |
| Louisiana | | Cane River Creole National Historical Park |
| | | Jean Lafitte National Historical Park and Preserve |
| | | New Orleans Jazz National Historical Park |
| | | Poverty Point National Monument |
| | | Vicksburg National Military Park |
| Maine | X | Acadia National Park |
| | | Frances Perkins National Monument |
| | X | Katahdin Woods and Waters National Monument |
| | | Saint Croix Island International Historic Site |
| Maine to Georgia | | Appalachian National Scenic Trail |
| Maryland | | Antietam National Battlefield |
| | | Assateague Island National Seashore |
| | | Catoctin Mountain Park |
| | | Chesapeake and Ohio Canal National Historical Park |
| | | Clara Barton National Historic Site |
| | | Fort McHenry National Monument and Historic Shrine |
| | | Fort Washington Park |
| | | George Washington Memorial Parkway |
| | | Greenbelt Park |
| | | Hampton National Historic Site |
| | | Harriet Tubman Underground Railroad National Historical Park |
| | | Monocacy National Battlefield |
| | | Piscataway Park |
| | | Potomac Heritage National Scenic Trail |
| | | Thomas Stone National Historic Site |
| Massachusetts | | Adams National Historical Park |
| | | Blackstone River Valley National Historical Park |
| | | Boston African American National Historic Site |
| | | Boston Harbor Islands National Recreation Area |
| | | Boston National Historical Park |
| | X | Cape Cod National Seashore |
| | | Frederick Law Olmsted National Historic Site |
| | | John F. Kennedy National Historic Site |
| | | Longfellow House–Washington’s Headquarters National Historic Site |
| | | Lowell National Historical Park |
| | X | Minute Man National Historical Park |
| | X | New Bedford Whaling National Historical Park |
| | | New England National Scenic Trail |
| | | Salem Maritime National Historic Site |
| | | Saugus Iron Works National Historic Site |
| | | Springfield Armory National Historic Site |
| Michigan | | Isle Royale National Park |
| | X | Keweenaw National Historical Park |
| | | North Country National Scenic Trail |
| | X | Pictured Rocks National Lakeshore |
| | | River Raisin National Battlefield Park |
| | X | Sleeping Bear Dunes National Lakeshore |
| Minnesota | X | Grand Portage National Monument |
| | X | Mississippi National River and Recreation Area |
| | | North Country National Scenic Trail |
| | X | Pipestone National Monument |
| | X | Saint Croix National Scenic Riverway |
| | X | Voyageurs National Park |
| Mississippi | | Brices Cross Roads National Battlefield Site |
| | | Emmett Till and Mamie Till-Mobley National Monument |
| | | Gulf Islands National Seashore |
| | | Medgar and Myrlie Evers Home National Monument |
| | | Natchez National Historical Park |
| | | Natchez Trace National Scenic Trail |
| | | Natchez Trace Parkway |
| | | Shiloh National Military Park |
| | | Tupelo National Battlefield |
| | | Vicksburg National Military Park |
| Missouri | X | Gateway Arch National Park |
| | | George Washington Carver National Monument |
| | | Harry S Truman National Historic Site |
| | X | Ozark National Scenic Riverways |
| | | Ste. Genevieve National Historical Park |
| | | Ulysses S. Grant National Historic Site |
| | | Wilson’s Creek National Battlefield |
| Montana | | Big Hole National Battlefield |
| | X | Bighorn Canyon National Recreation Area |
| | X | Fort Union Trading Post National Historic Site |
| | X | Glacier National Park |
| | | Grant-Kohrs Ranch National Historic Site |
| | | Little Bighorn Battlefield National Monument |
| | X | Yellowstone National Park |
| Nebraska | | Agate Fossil Beds National Monument |
| | | Homestead National Historical Park |
| | | Missouri National Recreational River |
| | X | Niobrara National Scenic River |
| | X | Scotts Bluff National Monument |
| Nevada | | Death Valley National Park |
| | | Great Basin National Park |
| | | Lake Mead National Recreation Area |
| | | Tule Springs Fossil Beds National Monument |
| New Hampshire | | Saint-Gaudens National Historical Park |
| New Jersey | | Delaware Water Gap National Recreation Area |
| | | Gateway National Recreation Area |
| | | Great Egg Harbor Scenic and Recreational River |
| | | Morristown National Historical Park |
| | | Paterson Great Falls National Historical Park |
| | | Statue of Liberty National Monument |
| | | Thomas Edison National Historical Park |
| New Mexico | | Aztec Ruins National Monument |
| | | Bandelier National Monument |
| | | Capulin Volcano National Monument |
| | X | Carlsbad Caverns National Park |
| | | Chaco Culture National Historical Park |
| | X | El Malpais National Monument |
| | | El Morro National Monument |
| | X | Fort Union National Monument |
| | | Gila Cliff Dwellings National Monument |
| | | Manhattan Project National Historical Park |
| | | Pecos National Historical Park |
| | | Petroglyph National Monument |
| | | Salinas Pueblo Missions National Monument |
| | | Valles Caldera National Preserve |
| | X | White Sands National Park |
| New York | | African Burial Ground National Monument |
| | | Castle Clinton National Monument |
| | | Eleanor Roosevelt National Historic Site |
| | | Federal Hall National Memorial |
| | | Fire Island National Seashore |
| | | Fort Stanwix National Monument |
| | | Gateway National Recreation Area |
| | | General Grant National Memorial |
| | | Governors Island National Monument |
| | | Hamilton Grange National Memorial |
| | | Harriet Tubman National Historical Park |
| | | Home of Franklin D. Roosevelt National Historic Site |
| | | Martin Van Buren National Historic Site |
| | | North Country National Scenic Trail |
| | | Sagamore Hill National Historic Site |
| | | Saint Paul’s Church National Historic Site |
| | | Saratoga National Historical Park |
| | | Statue of Liberty National Monument |
| | | Stonewall National Monument |
| | | Theodore Roosevelt Birthplace National Historic Site |
| | | Theodore Roosevelt Inaugural National Historic Site |
| | | Vanderbilt Mansion National Historic Site |
| | X | Women’s Rights National Historical Park |
| North Carolina | | Blue Ridge Parkway |
| | | Cape Hatteras National Seashore |
| | | Cape Lookout National Seashore |
| | | Carl Sandburg Home National Historic Site |
| | | Fort Raleigh National Historic Site |
| | X | Great Smoky Mountains National Park |
| | | Guilford Courthouse National Military Park |
| | | Moores Creek National Battlefield |
| | | Wright Brothers National Memorial |
| North Dakota | X | Fort Union Trading Post National Historic Site |
| | X | Knife River Indian Villages National Historic Site |
| | | North Country National Scenic Trail |
| | X | Theodore Roosevelt National Park |
| Ohio | | Charles Young Buffalo Soldiers National Monument |
| | X | Cuyahoga Valley National Park |
| | X | Dayton Aviation Heritage National Historical Park |
| | | First Ladies National Historic Site |
| | | Hopewell Culture National Historical Park |
| | X | James A. Garfield National Historic Site |
| | | North Country National Scenic Trail |
| | | Perry’s Victory and International Peace Memorial |
| | | William Howard Taft National Historic Site |
| Oklahoma | | Chickasaw National Recreation Area |
| | | Washita Battlefield National Historic Site |
| Oregon | | Crater Lake National Park |
| | | Fort Vancouver National Historic Site |
| | | John Day Fossil Beds National Monument |
| | | Lewis and Clark National Historical Park |
| | | Oregon Caves National Monument and Preserve |
| Pennsylvania | | Allegheny Portage Railroad National Historic Site |
| | | Carlisle Federal Indian Boarding School National Monument |
| | X | Delaware Water Gap National Recreation Area |
| | | Edgar Allan Poe National Historic Site |
| | | Eisenhower National Historic Site |
| | | First State National Historical Park |
| | X | Flight 93 National Memorial |
| | X | Fort Necessity National Battlefield |
| | | Friendship Hill National Historic Site |
| | X | Gettysburg National Military Park |
| | | Hopewell Furnace National Historic Site |
| | | Independence National Historical Park |
| | X | Johnstown Flood National Memorial |
| | | Middle Delaware National Scenic River |
| | | North Country National Scenic Trail |
| | | Potomac Heritage National Scenic Trail |
| | | Steamtown National Historic Site |
| | | Thaddeus Kosciuszko National Memorial |
| | | Upper Delaware Scenic and Recreational River |
| | | Valley Forge National Historical Park |
| Puerto Rico | | San Juan National Historic Site |
| Rhode Island | | Blackstone River Valley National Historical Park |
| | | Roger Williams National Memorial |
| South Carolina | | Charles Pinckney National Historic Site |
| | | Congaree National Park |
| | | Cowpens National Battlefield |
| | | Fort Sumter and Fort Moultrie National Historical Park |
| | | Kings Mountain National Military Park |
| | | Ninety Six National Historic Site |
| | | Reconstruction Era National Historical Park |
| South Dakota | X | Badlands National Park |
| | | Jewel Cave National Monument |
| | X | Minuteman Missile National Historic Site |
| | | Missouri National Recreational River |
| | X | Mount Rushmore National Memorial |
| | X | Wind Cave National Park |
| Tennessee | | Andrew Johnson National Historic Site |
| | | Big South Fork National River and Recreation Area |
| | | Chickamauga & Chattanooga National Military Park |
| | X | Cumberland Gap National Historical Park |
| | X | Fort Donelson National Battlefield |
| | X | <Great Smoky Mountains National Park |
| | | Manhattan Project National Historical Park |
| | X | Natchez Trace National Scenic Trail |
| | X | Natchez Trace Parkway |
| | | Obed Wild and Scenic River |
| | | Shiloh National Military Park |
| | | Stones River National Battlefield |
| Texas | | Alibates Flint Quarries National Monument |
| | | Amistad National Recreation Area |
| | | Big Bend National Park |
| | | Big Thicket National Preserve |
| | | Blackwell School National Historic Site |
| | X | Chamizal National Memorial |
| | | Fort Davis National Historic Site |
| | X | Guadalupe Mountains National Park |
| | | Lake Meredith National Recreation Area |
| | | Lyndon B. Johnson National Historical Park |
| | | Padre Island National Seashore |
| | | Palo Alto Battlefield National Historical Park |
| | | Rio Grande Wild and Scenic River |
| | | San Antonio Missions National Historical Park |
| | | Waco Mammoth National Monument |
| Utah | | Arches National Park |
| | | Bryce Canyon National Park |
| | | Canyonlands National Park |
| | | Capitol Reef National Park |
| | | Cedar Breaks National Monument |
| | | Dinosaur National Monument |
| | | Glen Canyon National Recreation Area |
| | | Golden Spike National Historical Park |
| | | Hovenweep National Monument |
| | | Natural Bridges National Monument |
| | | Rainbow Bridge National Monument |
| | | Timpanogos Cave National Monument |
| | | Zion National Park |
| Vermont | | Marsh-Billings-Rockefeller National Historical Park |
| | | North Country National Scenic Trail |
| Virgin Islands | | Buck Island Reef National Monument |
| | | Christiansted National Historic Site |
| | | Salt River Bay National Historical Park and Ecological Preserve |
| | | Virgin Islands Coral Reef National Monument |
| | | Virgin Islands National Park |
| Virginia | | Appomattox Court House National Historical Park |
| | | Arlington House, The Robert E. Lee Memorial |
| | | Assateague Island National Seashore |
| | | Blue Ridge Parkway |
| | | Booker T. Washington National Monument |
| | | Cedar Creek and Belle Grove National Historical Park |
| | | Colonial National Historical Park |
| | X | Cumberland Gap National Historical Park |
| | | Fort Monroe National Monument |
| | | Fredericksburg and Spotsylvania National Military Park |
| | | George Washington Birthplace National Monument |
| | | George Washington Memorial Parkway |
| | | Maggie L. Walker National Historic Site |
| | | Manassas National Battlefield Park |
| | | Petersburg National Battlefield |
| | | Potomac Heritage National Scenic Trail |
| | | Prince William Forest Park |
| | | Richmond National Battlefield Park |
| | | Shenandoah National Park |
| | | Wolf Trap National Park for the Performing Arts |
| Washington | | Ebey’s Landing National Historical Reserve |
| | | Fort Vancouver National Historic Site |
| | | Klondike Gold Rush National Historical Park |
| | | Lake Chelan National Recreation Area |
| | | Lake Roosevelt National Recreation Area |
| | | Lewis and Clark National Historical Park |
| | | Manhattan Project National Historical Park |
| | | Mount Rainier National Park |
| | | North Cascades National Park |
| | | Olympic National Park |
| | | Ross Lake National Recreation Area |
| | | San Juan Island National Historical Park |
| | | Whitman Mission National Historic Site |
| West Virginia | | Bluestone National Scenic River |
| | | Gauley River National Recreation Area |
| | | Harpers Ferry National Historical Park |
| | | New River Gorge National Park and Preserve |
| Wisconsin | X | Apostle Islands National Lakeshore |
| | X | Ice Age National Scenic Trail |
| | | North Country National Scenic Trail |
| | X | Saint Croix National Scenic Riverway |
| Wyoming | X | Bighorn Canyon National Recreation Area |
| | | Devils Tower National Monument |
| | | Fort Laramie National Historic Site |
| | | Fossil Butte National Monument |
| | X | Grand Teton National Park |
| | X | John D. Rockefeller Jr. Memorial Parkway |
| | X | Yellowstone National Park |
