Mercier denotes the Eastern portion of the Mercier–Hochelaga-Maisonneuve borough of the city of Montreal. It is a former district of Montreal. It consists of two neighbourhoods Mercier-Ouest and Mercier-Est (often called Tétreaultville).
It was named after Honoré Mercier (1840-1894), Premier of Quebec from 1887 to 1891. Mercier was an agglomeration of old villages: Beau-Rivage, Longue-Pointe and Tétreaultville. It was annexed to Montreal in 1910. In 1960, the construction of the Autoroute 25 saw the demolition of many residential buildings in Mercier and divided it into two districts: Mercier-Ouest and Mercier-Est.
References
Mercier, Montreal Wikipedia(Text) CC BY-SA