The Union municipale de Saint-Léonard (UMSL) was a municipal political party in the suburban community of Saint-Leonard in Montreal, Quebec, Canada, during the early to mid-1980s.
[1] Rosario Ortona became the UMSL's leader after the 1982 election and was its mayoral candidate in a 1984 by-election that was called after di Ciocco's unexpected death.
The UMSL also contested an April 1985 by-election, with a candidate who was narrowly defeated by a member of Renaud's party.
[2] Nanci and Boyer resigned from the UMSL in July 1985 to sit as independents, saying that they intended to form a new party that would better represent Saint-Leonard's merchant community.
[3] Nanci and Boyer subsequently joined the Unité de Saint-Léonard party while Ortona ultimately dissolved the UMSL to join the Rassemblement des citoyens et citoyennes de Saint-Léonard.