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**Parti social démocratique du Québec**

Social Democratic Party of Quebec
Parti social démocratique du Québec Social Democratic Party of Quebec
Founded	1939 (as Fédération du Commonwealth Coopératif)
Dissolved	1961
Preceded by	Parti ouvrier
Succeeded by	New Democratic Party of Quebec and Parti socialiste du Québec
Ideology	Social democracy; Democratic socialism
Political position	Centre-left to left-wing
National affiliation	Co-operative Commonwealth Federation
International affiliation	Socialist International
Colours	Green and Yellow
	Politics of Quebec; Political parties; Elections;

The Parti social démocratique du Québec (French pronunciation: [paʁti sɔsjal demɔkʁatik dy kebɛk], lit. 'Social Democratic Party of Quebec', abbr. PSD) was the Quebec wing of the Co-operative Commonwealth Federation. It was founded in 1939 as the Fédération du Commonwealth Coopératif and was led by Romuald-Joseph Lamoureux in the 1944 general election, by Thérèse Casgrain from 1951 to 1957 and by Michel Chartrand from 1957 to 1960. The name Parti social démocratique was adopted in 1955.

The party was refounded in 1963 as the New Democratic Party of Quebec (Nouveau Parti démocratique du Québec). However, the party soon split over the issue of Quebec self-determination. In November 1963, Quebec nationalists left the PSD to form the Parti socialiste du Québec; the latter was led by former PSD leader Michel Chartrand.

The NDPQ renamed itself the Parti de la Democratie Socialiste (Party of Socialist Democracy) following a 1991 split with the federal NDP over the question of Quebec independence.^[1]

General election results

General election	Leader	# of candidates	# of seats won	% of popular vote
1936 (CCF)*	n/a	1/90	0	0.26%
1939 (FCC)	n/a	1/86	0	0.45%
1944 (FCC)	Romuald-Joseph Lamoureux	26/91	1	2.89%
1948 (FCC)	n/a	8/92	0	0.60%
1952 (FCC)	Thérèse Casgrain	23/92	0	0.96%
1956 (PSD)	Thérèse Casgrain	26/93	0	0.61%
1960 (PSD)	Michel Chartrand	1/95	0	0.01%