Bonne Bay /ˈbɒn/ is a bay in Newfoundland, Canada. It is located on the western coast of Newfoundland and separates the Great Northern Peninsula from the rest of the island. It is a part of Gros Morne National Park. Mafic rock underlies the western shores of Bonne Bay, and clastic sedimentary rock is found on the eastern side. Soils on mafic rock belong to the Serpentine Cove Association, while sedimentary rock supports the Cox's Cove Association.