The Bulgarian Socialist Party (Bulgarian: Balgarska Socialističeska Partija) is a political party in Bulgaria. It is led by Sergei Stanishev.

In the 2001 parliamentary elections it was part of the Coalition for Bulgaria alliance which picked up 48 of 240 seats. Current president, Georgi Parvanov was a member of the party.

See also: List of political parties in Bulgaria, Politics of Bulgaria.