Here is a complete listing of the 422 official units of the National Parks System in the US. Yes, the National Park Service counts a bit awkwardly—some areas they manage aren’t included, and some places seem to be counted twice—but these are the official National Park units.
Be sure to check out my personal quest to visit each of them (I finished all 419 in 2019). You can also snag a copy of this spreadsheet to help you count how many you’ve been to.
- Abraham Lincoln Birthplace National Historic Park
- Acadia National Park
- Adams National Historical Park
- African Burial Ground National Monument
- Agate Fossil Beds National Monument
- Alagnak Wild River
- Alibates Flint Quarries National Monument
- Allegheny Portage Railroad National Historic Site
- Amistad National Recreation Area
- Andersonville National Historic Site
- Andrew Johnson National Historic Site
- Aniakchak National Monument
- Aniakchak National Preserve
- Antietam National Battlefield
- Apostle Island National Lakeshore
- Appalachian National Scenic Trail
- Appomattox Court House National Historical Park
- Arches National Park
- Arkansas Post National Memorial
- Arlington House, The Robert E. Lee Memorial
- Assateague Island National Seashore
- Aztec Ruins National Monument
- Badlands National Park
- Bandelier National Monument
- Belmont-Paul Women’s Equality National Monument
- Bent’s Old Fort National Historic Site
- Bering Land Bridge National Preserve
- Big Bend National Park
- Big Cypress National Preserve
- Big Hole National Battlefield
- Big South Fork National River & Recreation Area
- Big Thicket National Preserve
- Bighorn Canyon National Recreation Area
- Birmingham Civil Rights National Monument
- Biscayne National Park
- Black Canyon of the Gunnison National Park
- Blackstone River Valley National Historical Park
- Blue Ridge Parkway
- Bluestone National Scenic River
- Booker T. Washington National Memorial
- Boston African American National Historic Site
- Boston Harbor Islands National Recreation Area
- Boston National Historical Park
- Brices Cross Roads National Battlefield Site
- Brown vs. Board of Education National Historic Site
- Bryce Canyon National Park
- Buck Island Reef National Monument
- Buffalo National River
- Cabrillo National Monument
- Camp Nelson Heritage National Monument
- Canaveral National Seashore
- Cane River Creole National Historical Park
- Canyon de Chelly National Monument
- Canyonlands National Park
- Cape Cod National Seashore
- Cape Hatteras National Seashore
- Cape Krusenstern National Monument
- Cape Lookout National Seashore
- Capitol Reef National Park
- Capulin Volcano National Monument
- Carl Sandburg Home National Historic Site
- Carlsbad Caverns National Park
- Carter G. Woodson Home National Historic Site
- Casa Grande Ruins National Monument
- Castillo de San Marcos National Monument
- Castle Clinton National Monument
- Castle Mountains National Monument
- Catoctin Mountain Park
- Cedar Breaks National Monument
- Cedar Creek & Belle Grove National Historical Park
- César E. Chávez National Monument
- Chaco Culture National Historical Park
- Chamizal National Memorial
- Channel Islands National Park
- Charles Pinckney National Historic Site
- Charles Young Buffalo Soldiers National Monument
- Chattahoochee River National Recreation Area
- Chesapeake & Ohio Canal National Historical Park
- Chickamauga & Chattanooga National Military Park
- Chickasaw National Recreation Area
- Chiricahua National Monument
- Christiansted National Historical Park
- City of Rocks National Reserve
- Clara Barton National Historic Site
- Colonial National Historical Park
- Colorado National Monument
- Congaree National Park
- Constitution Gardens
- Coronado National Memorial
- Cowpens National Battlefield
- Crater Lake National Park
- Craters of the Moon National Monument
- Craters of the Moon National Preserve
- Cumberland Gap National Historical Park
- Cumberland Island National Seashore
- Curecanti National Recreation Area
- Cuyahoga Valley National Park
- Dayton Aviation Heritage National Historical Park
- De Soto National Memorial
- Death Valley National Park
- Delaware Water Gap National Recreation Area
- Denali National Park
- Denali National Preserve
- Devils Postpile National Monument
- Devils Tower National Monument
- Dinosaur National Monument
- Dry Tortugas National Park
- Dwight D. Eisenhower Memorial
- Ebey’s Landing National Historical Reserve
- Edgar Allan Poe National Historic Site
- Effigy Mounds National Monument
- Eisenhower National Historic Site
- El Malpais National Monument
- El Morro National Monument
- Eleanor Roosevelt National Historic Site
- Eugene O’Neill National Historic Site
- Everglades National Park
- Federal Hall National Memorial
- Fire Island National Seashore
- First Ladies National Historic Site
- First State National Monument
- Flight 93 National Memorial
- Florissant Fossil Beds National Monument
- Ford’s Theatre National Historic Site
- Fort Bowie National Historic Site
- Fort Caroline National Memorial
- Fort Davis National Historic Site
- Fort Donelson National Battlefield
- Fort Frederica National Monument
- Fort Laramie National Historic Site
- Fort Larned National Historic Site
- Fort Matanzas National Monument
- Fort McHenry National Monument & Historic Shrine
- Fort Monroe National Monument
- Fort Necessity National Battlefield
- Fort Point National Historic Site
- Fort Pulaski National Monument
- Fort Raleigh National Historic Site
- Fort Scott National Historic Site
- Fort Smith National Historic Site
- Fort Stanwix National Monument
- Fort Sumter and Fort Moultrie National Historical Park
- Fort Union National Monument
- Fort Union Trading Post National Historic Site
- Fort Vancouver National Historic Site
- Fort Washington Park
- Fossil Butte National Monument
- Franklin Delano Roosevelt Memorial
- Frederick Douglass National Historic Site
- Frederick Law Olmstead National Historic Site
- Fredericksburg & Spotsylvania County Battlefields Memorial National Historical Park
- Freedom Riders National Monument
- Friendship Hill National Historic Site
- Gates of the Artic National Park
- Gates of the Artic National Preserve
- Gateway National Recreation Area
- Gauley River National Recreation Area
- General Grant National Memorial
- George Rogers Clark National Historical Park
- George Washington Birthplace National Monument
- George Washington Carver National Monument
- George Washington Memorial Parkway
- Gettysburg National Military Park
- Gila Cliff Dwellings National Monument
- Glacier Bay National Park
- Glacier Bay National Preserve
- Glacier National Park
- Glen Canyon National Recreation Area
- Golden Gate National Recreation Area
- Golden Spike National Historical Park
- Governors Island National Monument
- Grand Canyon National Park
- Grand Portage National Monument
- Grand Teton National Park
- Grant-Kohrs Ranch National Historic Site
- Great Basin National Park
- Great Egg Harbor Scenic & Recreational River
- Great Sand Dunes National Park
- Great Sand Dunes National Preserve
- Great Smoky Mountains National Park
- Greenbelt Park
- Guadalupe Mountains National Park
- Guilford Courthouse National Military Park
- Gulf Islands National Seashore
- Hagerman Fossil Beds National Monument
- Haleakalā National Park
- Hamilton Grange National Memorial
- Hampton National Historic Site
- Harpers Ferry National Historic Park
- Harriet Tubman National Historical Park
- Harriet Tubman Underground Railroad National Monument
- Harry S Truman National Historic Site
- Hawai’i Volcanoes National Park
- Herbert Hoover National Historic Site
- Hohokam Pima National Monument
- Home of Franklin D. Roosevelt National Historic Site
- Homestead National Monument of America
- Honouliuli National Historic Site
- Hopewell Culture National Historical Park
- Hopewell Furnace National Historic Site
- Horseshoe Bend National Military Park
- Hot Springs National Park
- Hovenweep National Monument
- Hubbell Trading Post National Historic Site
- Independence National Historical Park
- Indiana Dunes National Park
- Isle Royale National Park
- James A. Garfield National Historic Site
- Jean Lafitte National Historical Park and Preserve
- Jefferson National Expansion Memorial
- Jewel Cave National Monument
- Jimmy Carter National Historic Site
- John D. Rockefeller Jr. Memorial Parkway
- John Day Fossil Beds National Monument
- John Fitzgerald Kennedy National Historic Site
- John Muir National Historic Site
- Johnstown Flood National Memorial
- Joshua Tree National Park
- Kalaupapa National Historical Park
- Kaloko-Honokōhau National Historical Park
- Katahdin Woods and Waters National Monument
- Katmai National Park
- Katmai National Preserve
- Kenai Fjords National Park
- Kennesaw Mountain National Battlefield Park
- Keweenaw National Historical Park
- Kings Canyon National Park
- Kings Mountain National Military Park
- Klondike Gold Rush National Historical Park
- Knife River Indian Villages National Historic Site
- Kobuk Valley National Park
- Korean War Veterans Memorial
- Lake Chelan National Recreation Area
- Lake Clark National Park
- Lake Clark National Preserve
- Lake Mead National Recreation Area
- Lake Meredith National Recreation Area
- Lake Roosevelt National Recreation Area
- Lassen Volcanic National Park
- Lava Beds National Monument
- Lewis & Clark National Historic Park
- Lincoln Boyhood National Memorial
- Lincoln Home National Historic Site
- Lincoln Memorial
- Little Bighorn Battlefield National Monument
- Little River Canyon National Preserve
- Little Rock Central High School National Historic Site
- Longfellow House-Washington’s Headquarters National Historic Site
- Lowell National Historical Park
- Lyndon B. Johnson National Historical Park
- Lyndon Baines Johnson Memorial Grove on the Potomac
- Maggie L. Walker National Historic Site
- Mammoth Cave National Park
- Manassas National Battlefield Park
- Manhattan Project National Historical Park
- Manzanar National Historic Site
- Marsh-Billings-Rockefeller National Historical Park
- Martin Luther King, Jr. Memorial
- Martin Luther King Jr. National Historic Site
- Martin Van Buren National Historic Site
- Mary McLeod Bethune Council House National Historic Site
- Mesa Verde National Park
- Middle Delaware National Scenic River
- Mill Springs Battlefield National Monument
- Minidoka National Historic Site
- Minute Man National Historical Park
- Minuteman Missile National Historic Site
- Mississippi National River & Recreation Area
- Missouri National Recreational River
- Mojave National Preserve
- Monocacy National Battlefield
- Montezuma Castle National Monument
- Moores Creek National Battlefield
- Morristown National Historical Park
- Mount Rainier National Park
- Mount Rushmore National Memorial
- Muir Woods National Monument
- Natchez National Historical Park
- Natchez Trace National Scenic Trail
- Natchez Trace Parkway
- National Capital Parks
- National Mall
- National Park of American Samoa
- Natural Bridges National Monument
- Navajo National Monument
- New Bedford Whaling National Historical Park
- New Orleans Jazz National Historical Park
- New River Gorge National River
- Nez Perce National Historical Park
- Nicodemus National Historic Site
- Ninety Six National Historic Site
- Niobrara National Scenic River
- Noatak National Preserve
- North Cascades National Park
- Obed Wild & Scenic River
- Ocmulgee Mounds National Historical Park
- Olympic National Park
- Oregon Caves National Monument
- Organ Pipe Cactus National Monument
- Ozark National Scenic River
- Padre Island National Seashore
- Palo Alto Battlefield National Historic Park
- Paterson Great Falls National Historical Park
- Pea Ridge National Military Park
- Pearl Harbor National Memorial
- Pecos National Historical Park
- Pennsylvania Avenue National Historic Site
- Perry’s Victory & International Peace Memorial
- Petersburg National Battlefield Park
- Petrified Forest National Park
- Petroglyph National Monument
- Pictured Rocks National Lakeshore
- Pinnacles National Monument
- Pipe Spring National Monument
- Pipestone National Monument
- Piscataway Park
- Point Reyes National Seashore
- Port Chicago Naval Magazine National Memorial
- Potomac Heritage National Scenic Trail
- Poverty Point National Monument
- President Willaim Jefferson Clinton Birthplace Home National Historic Site
- Prince William Forest Park
- Pullman National Monument
- Pu’uhonau o Hōnaunau National Historical Park
- Pu’ukoholā Heiau National Historic Site
- Rainbow Bridge National Monument
- Reconstruction Era National Historical Park
- Redwood National Park
- Richmond National Battlefield Park
- Rio Grande Wild & Scenic River
- River Raisin National Battlefield Park
- Rock Creek Park
- Rocky Mountain National Park
- Roger Williams National Memorial
- Rosie the Riveter/WWII Home Front National Historical Park
- Ross Lake National Recreation Area
- Russell Cave National Monument
- Sagamore Hill National Historic Site
- Saguaro National Park
- Saint Croix Island International Historic Site
- Saint Croix National Scenic Riverway
- Saint Paul’s Church National Historic Site
- Saint-Gaudens National Historical Park
- Sainte Geneviève National Historical Park
- Salem Maritime National Historic Site
- Salinas Pueblo Missions National Monument
- Salt River Bay National Historical Park & Ecological Preserve
- San Antonio Missions National Historical Park
- San Francisco Maritime National Historical Park
- San Juan Island National Historical Park
- San Juan National Historic Site
- Sand Creek Massacre National Historic Site
- Santa Monica Mountains National Recreation Area
- Saratoga National Historical Park
- Saugus Iron Works National Historic Site
- Scotts Bluff National Monument
- Sequoia National Park
- Shenandoah National Park
- Shiloh National Military Park
- Sitka National Historical Park
- Sleeping Bear Dunes National Lakeshore
- Springfield Armory National Historic Site
- Statue of Liberty National Monument (includes Ellis Island)
- Steamtown National Historic Site
- Stones River National Battlefield
- Stonewall National Monument
- Sunset Crater Volcano National Monument
- Tallgrass Prairie National Preserve
- Thaddeus Kosciuszko National Memorial
- Theodore Roosevelt Birthplace National Historic Site
- Theodore Roosevelt Inaugural National Historic Site
- Theodore Roosevelt Island National Memorial
- Theodore Roosevelt National Park
- Thomas Edison National Historic Park
- Thomas Jefferson Memorial
- Thomas Stone National Historic Site
- Timpanogos Cave National Monument
- Timucuan Ecological & Historic Preserve
- Tonto National Monument
- Tule Lake National Monument
- Tule Springs Fossil Beds National Monument
- Tumacacori National Historical Park
- Tupelo National Battlefield
- Tuskegee Airmen National Historic Site
- Tuskegee Institute National Historic Site
- Tuzigoot National Monument
- Ulysses S. Grant National Historic Site
- Upper Delaware Scenic & Recreational River
- Valles Caldera National Preserve
- Valley Forge National Historical Park
- Vanderbilt Mansion National Historic Site
- Vicksburg National Military Park
- Vietnam Veterans Memorial
- Virgin Islands Coral Reef National Monument
- Virgin Islands National Park
- Voyageurs National Park
- Waco Mammoth National Monument
- Walnut Canyon National Monument
- War in the Pacific National Historical Park
- Washington Monument (National Memorial)
- Washita Battlefield National Historic Site
- Weir Farm National Historic Site
- Whiskeytown-Shasta-Trinity National Recreation Area
- White House, The
- White Sands National Park
- Whitman Mission National Historic Site
- William Howard Taft National Historic Site
- Wilson’s Creek National Battlefield
- Wind Cave National Park
- Wolf Trap National Park for the Performing Arts
- Women’s Rights National Historical Park
- (National) World War II Memorial
- World War I Memorial
- Wrangell-St. Elias National Park
- Wrangell-St. Elias National Preserve
- Wright Brothers National Memorial
- Wupatki National Monument
- Yellowstone National Park
- Yosemite National Park
- Yucca House National Monument
- Yukon-Charley Rivers National Preserve
- Zion National Park
Whew, you made it through the long list!
Additionally, there are a number of national park units that have been authorized but not yet officially established (often this process requires the transfer of land and/or the development of a cooperating agreement). This list does not include authorized units.
How many have you been to? Grab the spreadsheet and find out.
Updated as of September 26, 2020.