Grand Bay is a parliamentary electoral district in Dominica. It includes the areas of Grand Bay, Bordieux and Montine. It came into effect in time for the 1975 Dominican general election. It has been represented by Vince Henderson of the Dominica Labour Party since the 2021 by-election.
The constituency was established prior to the 1975 Dominican general election. There was an electorate of 3,934 . It includes the areas of Grand Bay, Bordieux and Montine. The boundary extends from the western border of Saint Patrick Parish, from Soufriere Ridge to Micham River, along Geneva River to the sea.
This constituency has elected the following members of the House of Assembly of Dominica: