Bombay Hook Island, Kent co., E Del., in Delaware Bay, at entrance to Delaware R., 6 mi/9.7 km E of Smyrna, marshy area separated from mainland by slough (W) and Leipsic R. (S); 8.5 mi/13.7 km long; 39°17'N 75°26'W. Resort of Woodland Beach, near N end, connected by bridge to mainland. S part is Bombay Hook Natl. Wildlife Refuge.