Killcohook National Wildlife Refuge

Killcohook is a wildlife refuge located along the eastern bank of the Delaware River, featuring saltwater marshes and forested areas that shelter numerous bird species. The site spans low-lying terrain with open water channels and denser vegetation patches that together create layered habitats for wildlife.

The site was established as a wildlife refuge in 1934 and initially served as a disposal area for dredged river material managed by the Army Corps of Engineers. Its protected status changed in 1998 when Congress reassigned the land to a different federal management purpose.

The land configuration reflects the historical Twelve-Mile Circle agreement, which determined the border between Delaware and New Jersey at Finn's Point.

The refuge sits next to several other protected areas and state parks that link together into a continuous natural corridor. Before visiting, check which access points are available and what sections of the land are currently open to the public.

The refuge sits at a unique geographic location shaped by a historic boundary agreement between Delaware and New Jersey. This historical border arrangement created the distinctive placement of the land at a convergence point between two states.

Location: New Castle County

Inception: February 3, 1934

GPS coordinates: 39.61742,-75.56345

Latest update: December 12, 2025 17:45