Mobjack may refer to:
*''
SS Mobjack'', a coastal steamship owned by the Old Dominion Steamship Company.
*USS ''Mobjack'' (AVP-27), laid down as a United States Navy seaplane tender in 1942 but converted while under construction into motor torpedo boat tender
USS ''Mobjack'' (AGP-7)
*
USS ''Mobjack'' (AGP-7), a United States Navy motor torpedo boat tender in commission from 1943 to 1946
*
Mobjack Bay, a bay on the western shore of Chesapeake Bay.
*
Mobjack (dinghy), an American 1956 sailing dinghy design
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