Union Montreal (French: Union Montréal) is an inactive municipal political party in Montreal, Quebec, Canada. It was the governing party in the city from 2001, when it won its first election under mayor Gérald Tremblay, until 2012. The party remained the largest single party caucus in the city government until the 2013 election although it lost its majority in November 2012 due to a number of councillors quitting the party to sit as independents in the wake of Tremblay's resignation. Since 2013, it has no longer been politically active.