| Country: | Argentina |
| Democratic Socialist Party | |
| Native Name: | Partido Socialista Democratico |
| Colorcode: |
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| Abbreviation: | PSD |
| Foundation: | 1959 |
| Dissolution: | 2002 |
| Split: | Socialist Party |
| Successor: | Socialist Party |
| Ideology: | From 1959 to 1988: Social democracy Anti-Peronism From 1988 to 2002: Social democracy Progressivism |
| Position: | From 1959 to 1988: Center to centre-left From 1988 to 2002: Centre-left |
The Democratic Socialist Party (Spanish; Castilian: Partido Socialista Democrático) was a political party in Argentina formed in 1959 as a division of the Socialist Party.
The most important figure of the PSD was Alfredo Bravo, a teacher and civil rights activist, which was a deputy and the presidential candidate of the Socialist Party in the 2003 election.
The party joined the Popular Socialist Party in 2002 to form the Socialist Party.