John Heinz National Wildlife Refuge at Tinicum

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John Heinz National Wildlife Refuge at Tinicum
IUCN category IV (habitat/species management area)
The centerpiece of John Heinz NWR is a large impoundment, containing wetland habitat with "islands" of vegetation
Location	Delaware County and Philadelphia County, Pennsylvania, U.S.
Nearest city	Philadelphia, Pennsylvania, U.S.
Coordinates	39°53′09″N 75°15′44″W / 39.885866°N 75.262356°W / 39.885866; -75.262356
Area	1,200 acres (4.9 km2)
Established	1972
Governing body	U.S. Fish and Wildlife Service
Website	John Heinz National Wildlife Refuge at Tinicum
U.S. National Natural Landmark
Designated	1965

The John Heinz National Wildlife Refuge at Tinicum is a 1000-acre (4.05 km²) National Wildlife Refuge in Philadelphia and Tinicum Township, Pennsylvania. Adjacent to Philadelphia International Airport, the refuge protects the largest remaining freshwater tidal marsh in Pennsylvania. Established in 1972 as the Tinicum National Environmental Center, it was renamed in 1991 after the late H. John Heinz III, who helped preserve Tinicum Marsh.