Beaconsfield is an on-island suburb on the Island of Montreal in Quebec, Canada. Its population as of the Canada 2011 Census was 19,505.It is located on the north shore of Lake Saint-Louis and is bordered on the west by Baie-D'Urfé, on the north by Kirkland and on the east by Pointe-Claire. It was incorporated in 1910 and is named in honour of Benjamin Disraeli, Lord Beaconsfield, Prime Minister of the United Kingdom in the 1860s and 1870s and close confidant of Queen Victoria.