Edmundston, city in Madawaska County, in northwestern New Brunswick, Canada, at the confluence of the St. John and Madawaska rivers. Edmundston lies on Canada's border with the United States, separated from the American town of Madawaska, Maine, by the St. John River. Edmundston is a railroad center and the site of a large pulp mill. The city is a popular ski resort and a base for hunting and fishing.
The community was established by Acadians in the 1780s as Petit Sault (known as Little Falls in English). It was renamed Edmundston in 1848 for Sir Edmund W. Head, then the lieutenant governor of New Brunswick. Edmundston was incorporated as a city in 1952. Population 11,497 (1986); 11,033 (1996).