Côte Saint-Luc (and all of Montreal Island's other suburbs) was forced to merge with the city of Montreal on January 1, 2002, but was given the opportunity to demerge from the city in 2004. It was merged with its neighbouring suburbs of Hampstead and Montreal West to form the borough of Côte-Saint-Luc—Hampstead—Montréal-Ouest. In a referendum held on June 20, 2004 more than 87 percent of Côte Saint-Luc residents voted to demerge and Côte Saint-Luc was re-established as a separate city on January 1, 2006.