National Park System units in Maryland
Maryland has 17 National Park System units. The list below also includes 10 places the Park Service does not count as units of their own. Each one has its own page here with hours, current alerts, campgrounds and what there is to do.
Maryland in figures
- National Park System units
- 17
- Free to enter
- 12
- Recreation visits in 2025
- 22,399,897
- Busiest unit, 6,732,932 visits
- George Washington Memorial Parkway
- Campgrounds
- 55
A unit that reaches into another state counts in full here and in each other state it touches.
Potomac Heritage National Scenic Trail reports no 2025 count, so the visit total leaves it out.
Free to enter Charges an entrance feePoints are the Park Service reference point for each unit, not a boundary.
Parks near a city
Visits by year
George Washington Memorial ParkwayAppalachian National Scenic TrailChesapeake & Ohio Canal National Historical ParkAssateague Island National SeashoreHarpers Ferry National Historical ParkFort Washington ParkCatoctin Mountain ParkFort McHenry National Monument and Historic ShrinePiscataway ParkAntietam National BattlefieldGreenbelt ParkMonocacy National BattlefieldHampton National Historic SiteHarriet Tubman Underground Railroad National Historical ParkClara Barton National Historic SiteThomas Stone National Historic Site
Fees, hours, alerts, campgrounds and activities are from the NPS API. Data refreshed October 14, 2026.