Mahone Bay is a bay located on the Atlantic coast of Nova Scotia, Canada along the eastern end of Lunenburg County. Mahone Bay was named after the French mahonne (English: Barge), which referred to a type of boat used by local privateers.
Opening south directly onto the Atlantic, its eastern shore is formed by the Aspotogan Peninsula and its western shore is formed by the First Peninsula (of Lunenburg). The Chester Peninsula juts several kilometres into Mahone Bay at roughly its midpoint.
The bay's geological history differs from its eastern neighbour, St. Margarets Bay, in that Mahone Bay shows a greater variety of soils and bedrock. Numerous glacial drumlins on the western shore near the towns of Mahone Bay and Lunenburg have produced soil conditions suitable for small-scale farming operations.
Mahone Bay also differs from St. Margarets Bay in that it is dotted with innumerable small and medium-sized islands throughout its waters. The shelter provided by these islands, along with the summer southwesterly flow, led to the scenery around Mahone Bay becoming a tourist attraction in itself. Today the towns of Chester and Mahone Bay have become a destination for cruising in pleasure yachts. A scenic provincial park at Graves Island just east of Chester is a popular camping destination.
Mahone Bay is home to numerous picturesque working fishing communities, one of the most famous being the communities of Big Tancook and Little Tancook, located on Big Tancook Island and Little Tancook Island respectively. Other important fishing ports include Blandford.