The Coalition démocratique de Montréal (English: Democratic Coalition of Montreal) was a left-of-centre municipal political party that existed in Montreal, Quebec, Canada from 1989 to 2001.
The Democratic Coalition was launched on December 21, 1989, by Marvin Rotrand, Sam Boskey, Pierre-Yves Melançon and Pierre Goyer. All four were sitting members of the Montreal city council who had previously left the governing Montreal Citizens' Movement (MCM), on the grounds that it had abandoned its progressive roots and commitment to open government. Melançon was chosen as the party's first interim leader. The party was officially recognized by the province of Quebec on March 8, 1990.
The Democratic Coalition campaigned on a strong environmental platform in the 1990 municipal election, while also supporting proportional representation and renewed investment in public transit. The party operated in a partial alliance with another newly formed party called Ecology Montreal, such that the two parties did not field candidates against one another in the mayoralty race or most council districts. The Democratic Coalition ultimately contested approximately half the available council seats, and Melançon was its candidate for mayor. The party openly acknowledged it was unlikely to form government: in the middle of the campaign, Melançon remarked, "Everybody says that [Montreal mayor] Jean Doré will be re-elected, but what really matters is who will form the official opposition."
The MCM ultimately won a second consecutive landslide victory in the 1990 election. Melançon finished fourth in the mayoral contest and was also defeated in his bid for re-election to council. Rotrand, Boskey, and Goyer were all re-elected, although no other Democratic Coalition candidates were returned. Boskey subsequently succeeded Melançon as the party's leader.