Pierrefonds-Senneville is a former Montreal borough in the West Island area of Montreal, Quebec.

It was formed by forced merger on January 1, 2002. After Senneville voted on June 20, 2004 to demerge from Montreal and returned to being an independent municipality on January 1, 2006, the Pierrefonds

Pierrefonds, Quebec

Pierrefonds was a city on the Island of Montreal. It ceased to exist on January 1, 2002. The city was located along the Rivière des Prairies at the western end of the island...

 sector was merged with Roxboro

Roxboro, Quebec

Roxboro was a city on the Island of Montreal. It ceased to exist on January 1, 2002. The city was located along the Rivière des Prairies near the western end of the island. Its population, at that time, was 6,000.- History :...

 to create the borough of Pierrefonds-Roxboro

Pierrefonds-Roxboro

Pierrefonds-Roxboro is a borough of the city of Montreal. It is composed of the former municipalities of Pierrefonds and Roxboro, spanning the northern part of the West Island...

.

See also

• List of former boroughs
• Montreal Merger
  Montreal Merger
  As with other large cities like New York City and Toronto, the legal geographic boundaries of Montreal have been reorganized to incorporate adjacent communities which are integral to its social and economic life.-Merger and demerger:...
  
  
• Municipal reorganization in Quebec
  Municipal reorganization in Quebec
  The most recent episode of municipal reorganization in Quebec, Canada, was undertaken in 2002 by the Parti Québécois Government of Quebec, headed by Premier Lucien Bouchard and his successor Bernard Landry....