The Romanian Socialist Democratic Party (Romanian: Partidul Socialist Democratic Român, PSDR) was a political party in Romania. During its short existence, it was easily mistaken for Romanian Social Democratic Party (Romanian: Partidul Social Democrat Român).

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The PSDR contested the 1990 general elections, receiving around 1.1% of the vote in both the Chamber and Senate elections. Although it failed to win a seat in the Senate, the party won five seats in the Chamber.^[1] The 1992 elections saw its vote share fall to 0.9%, resulting in it losing all five seats.^[2]