LaSalle is the most southerly borough (arrondissement) of the city of Montreal, Quebec, Canada. It is located in the south-west portion of the Island of Montreal, along the Saint Lawrence River. Prior to 2002, it was a separate municipality that had been incorporated in 1912.

Municipal elections were held in the city of Montreal, Quebec, Canada on November 7, 2021, as part of the 2021 Quebec municipal elections. Voters elected 103 representatives in a first-past-the-post electoral system. The general election decides the majority composition of the city council and each of the 19 borough councils. The newly elected mayor appoints 2 city councillors for the Ville-Marie borough. In total, 18 borough mayors, 46 city councillors and 38 borough councillors were elected.