The Social Democratic Party (Spanish: Partido Social Demócrata, PSD) was a political party in Mexico during the late 1970s to 1982 with a moderate leftist tendency.

It was founded by Manuel Moreno Sánchez, a former member of the Institutional Revolutionary Party[1][2][3] Advocating revolutionary nationalism and a new left stance and founded due to political reforms implemented by José López Portillo y Pacheco.

The party was registered on 14 December 1980 [4] which eventually became part of the 1982 elections, in which it nominated Moreno as its presidential candidate.

He received 48,412 votes (0.21%) less than the 2% of the vote required to retain party registration, the party dissolved and disappeared.

This article about Mexican politics is a stub.