The Social Democratic Party (French: Parti Social Démocrate) is a centre-left Social democratic political party in Rwanda. In the parliamentary election held on 30 September 2003, the party won 12.3% of the popular vote and 7 out of 53 seats. It also received 7 seats in the 2008 elections.
The PSD supported President Paul Kagame in the 2003 presidential election. In the 2010 Rwandan presidential elections the party fielded Jean Damascene Ntawukuriryayo as their candidate. The incumbent Paul Kagame gained 92.9% of the vote and Ntawukuriryayo came second with 4.9%.