École Mathieu-Martin is a Francophone high school located on Champlain Street in Dieppe, New Brunswick, Canada. With an enrollment of close to 1025, the school is the largest of the French-language high schools in the Moncton area. It mostly serves the francophone students of the city of Dieppe and the village of Memramcook, New Brunswick. In addition, it is the largest francophone Secondary school in Atlantic Canada.