Rosemère (French pronunciation: [ʁozmɛʁ]) is an affluent suburb of Montreal, in southwestern Quebec, Canada on the north shore of the Rivière des Mille Îles in the Thérèse-De Blainville Regional County Municipality.

After the town's incorporation, documents were forwarded to Quebec City, and an accent was added to the middle 'e', according to statements by residents.

In the first half of the last century, Rosemère had several natural sandy beaches on the Rivière des Mille Îles and many cottages along the shoreline that were only used during the summer.

After World War II, Rosemère was transformed into a bedroom community of Montreal with the construction of homes in farmland and forested areas northwest of Grande Côte.

The French- and English-speaking communities of Rosemère have cohabitated for a long time, each of them leaving its own mark and institutions.

In 1992, a public consultation process confirmed the desire of residents to preserve the Town of Rosemère's bilingual status.

Population history, according to the Institut de la statistique du Québec: Rosemère is connected to Montreal's Lucien-L'Allier Station by commuter rail via the Rosemère station of the Exo (Réseau de transport métropolitain) Saint-Jérôme line.