The Party of Democrats (Italian: Partito dei Democratici, PD) was a social-democratic[1] and democratic socialist political party in San Marino.

Its counterpart in Italy was the Democrats of the Left.

The PD had its origins in Sammarinese Communist Party (PCS), which had changed its name to the Sammarinese Democratic Progressive Party (PPDS) in 1990.

On 25 March 2001 the PPDS merged with Ideas in Motion and the Socialists for Reform to form the PD.

This led to the split of the left-wing faction, which formed the Left Party (PdS).