The Battle of Chestnut Neck was fought on October 6, 1778 in southern New Jersey during the American Revolutionary War, at Chestnut Neck, a settlement on the Little Egg Harbor River (now known as the Mullica River) near the present-day town of Port Republic, New Jersey, which was used as a base by privateers. The British retrieved some supplies and destroyed others, as well as destroying some residences and other buildings.