Mobjack Bay is a bay on the western shore of Chesapeake Bay in Virginia in the United States. It lies between the Rappahannock River on the north and the York River on the south.
The World War II United States Navy motor torpedo boat tender USS Mobjack (AGP-7) was named for Mobjack Bay.
Coordinates: 37°17′01″N 76°17′59″W / 37.28361°N 76.29972°W