Kirkland is an on-island suburb on the Island of Montreal in southwestern Quebec, Canada. As of 2006, the population was 20,491. The average age in Kirkland, Quebec, is 40.2 years old. 79.8% of the population is aged 15 or older. It is named after Charles-Aimé Kirkland, a Quebec provincial politician. It was originally incorporated as a municipality in 1961.