Public lands in Delaware

3 units whose boundary reaches Delaware, 29,313 acres counted whole even where a boundary crosses into another state. 3 national wildlife refuges. Largest first within each type.

National wildlife refuges

All national wildlife refuges →

Refuge · USFWS

Bombay Hook National Wildlife Refuge

15,472 acresNational Wildlife Refuge

Refuge · USFWS

Prime Hook National Wildlife Refuge

10,161 acresNational Wildlife Refuge

Refuge · USFWS

Supawna Meadows National Wildlife Refuge

3,680 acresAlso NJ

Boundaries come from the agencies’ own layers. A unit is listed in every state its boundary reaches. Data refreshed September 18, 2026.