Tantramar is a provincial electoral district for the Legislative Assembly of New Brunswick, Canada.

In 2006, the electoral boundaries commission ruled that the district was an exceptional case, as it was surrounded by water and the province of Nova Scotia to the south and west, and to predominantly francophone areas to the north and east that would become significant minorities were they added to the district.

The 2013 boundaries commission refused to persist the exception and added the francophone village of Memramcook from the former riding of Memramcook-Lakeville-Dieppe to the district, giving the riding the new name of Memramcook-Tantramar.

This change is the subject of a constitutional challenge by francophone activists.

[1] Following the 2023 redistribution, the riding will be renamed back to Tantramar.