The Town of Mount Royal (abbreviated TMR) is an affluent on-island suburb located on the northwest side of Mount Royal, north of Downtown Montreal, on the Island of Montreal in southwestern Quebec, Canada. It is completely surrounded by Montreal. The population was 19,503 as of the Canada 2011 Census. In 2008, most of the Town of Mount Royal was designated a National Historic Site of Canada, as a "[remarkable] synthesis of urban renewal movements of the early 20th century, reflecting the influence of the City Beautiful, Garden City and Garden Suburb movements". The town celebrated its 100th anniversary in 2012.
The town was founded in 1912. It was created at the initiative of the Canadian Northern Railway. The town was designed by Frederick Todd, a planner who was heavily influenced by the likes of Ebenezer Howard and incorporated many aspects of the Garden City Movement as well some elements of the earlier City Beautiful movement into his design. The plan was to build a model city at the foot of the mountain. The company bought of farmland, and then built a rail tunnel under Mount Royal connecting their land to downtown Montreal. The profits from the venture helped finance the development of Canadian Northern's transcontinental railroad, which eventually became a significant constituent of the Canadian National Railway system. The town was designed by Canadian Northern's chief engineer, Henry Wicksteed, based loosely on Washington, D.C.
On January 1, 2002, as part of the 2002–2006 municipal reorganization of Montreal, it was merged into Montreal and became a borough. However, after a change of government and a 2004 referendum, it was re-constituted as an independent town on January 1, 2006.
One notable feature of the town is the naming of some of its streets, and also its occasionally idiosyncratic numbering system. Some streets which pass through the town may thus bear two names (in whichever language). For example, Jean Talon Street, a large East-West thoroughfare crossing Montreal for kilometres, goes a few hundred metres through Mount Royal under the name of Dresden Avenue, only to recover its Montreal name on the other side of town. This situation has been recently ameliorated by putting the two names on the street signs. On these few hundred meters, Mount Royal uses a house civic numbering totally different from that of Montreal on either side. This sort of change in the numbering system also occurs on smaller streets shared by both Montreal and Mount Royal (for example, Trenton, Lockhart and Brookfield avenues, where the Mount Royal numbering system decreases from East to West, only to jump from 2 to 2400 on the few metres of the street that still belong to Montreal).