This is a list of lands under federal protection in the U.S. states of Maryland and Delaware (the two were combined here because Delaware doesn't have enough for its own, separate list). Maryland has 2 national battlefields, 1 national historic park, 3 national historic sites, 2 national monuments, 1 national seashore, 5 national wildlife refuges, 1 national estuarine research reserve, 8 National Park Service parks, and parts of 4 national scenic or historic trails; Delaware has 1 national historic park, 2 national wildlife refuges, 1 national estuarine research reserve, and parts of 2 national historic trails.
