High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! St. Marys Bay is a bay located in western Nova Scotia, Canada, in Digby County. A sub-basin of the Gulf of Maine, the bay's southeastern shore is formed by mainland Nova Scotia, while its northwestern shore is formed by the Digby Neck, Long Island and Brier Island. The bay bifurcates the two municipal districts in Digby County, with the Francophone Clare Municipal District located on the mainland portion (southeastern shore) and the Digby Neck being part of the Digby Municipal District, which also occupies the eastern half of the county.