St. John Bay is a natural bay located on the western side of the Northern Peninsula of the island of Newfoundland, in the Canadian province of Newfoundland and Labrador.

St. John Bay is located in Newfoundland
St. John Bay
St. John Bay
Location of St. John Bay in Newfoundland

St. John Bay is formed by a shallow indentation and not typical of a land formation as bays are usually recognized. The bay is bounded by Port au Choix on the southern end and New Ferolle on the northern end. A number of islands are located in this bay with the largest of these being St. John Island. 50°53′18″N 57°06′34″W / 50.88833°N 57.10944°W / 50.88833; -57.10944