On July 6, 2002, unorganized territory Grand-Lac-Touradi was annexed by Saint-Eugène-de-Ladrière.[4]
History
The area has been inhabited since 1860. At the time, the territory was part of Saint-Fabien.[1]
In 1930, the mission of Saint-Eugène-de-Ladrière was established. The parish registers were opened on 30 January 1938. The first resident minister was Laurent Lavoie from 1942 to 1951.
The first parish priest was Oscar Thibeault from 1959 to 1968. The parish was canonically erected on 17 April 1962 and civilly erected the following 6 September. The municipality of Saint-Eugène-de-Ladrière was therefore created the same year by splitting from Saint-Fabien.
In the 2021 Census of Population conducted by Statistics Canada, Saint-Eugène-de-Ladrière had a population of 413 living in 183 of its 190 total private dwellings, a change of 9.3% from its 2016 population of 378. With a land area of 331.36 km2 (127.94 sq mi), it had a population density of 1.2/km2 (3.2/sq mi) in 2021.[5]