Municipal parties in Canada are unique: They are not branches of national parties, they have no established ideological orientation and their lifespans vary considerably. In light of these characteristics, political scientists tend to overlook the factors that contribute to their emergence and disappearance as well as the diversity of their forms. The objective of this article is to fill this gap. Taking the city of Montreal as a case study, we draw on an electoral database spanning from 1960 to 2001 and a systematic press review to show that a party’s longevity is influenced by factors that are either external to the parties (institutional, economic and provincial political context) or internal to the parties (strong internal coordination, charismatic leader and ability to survive after a leader’s departure). For Montreal, this translates into a longer lifespan for two types of parties: platform-based parties and government coalitions.
