Socialist Workers Party (Peru)

Socialist Workers Party (in Spanish: Partido Socialista de los Trabajadores, or PST) is a trotskyist political party in Peru founded in 1971 by a group of dissidents of the Revolutionary Left Front (FIR). The group was led by Hugo Blanco and Enrique Fernández Chacón.

In 1978, PST founded FOCEP together with other groups. In the same year it contested elections on the lists of FOCEP. In 1980, PST had its candidates on the lists of PRT.

PST is a member of LIT-CI. It publishes Bandera Socialista.

In 1992, PST split, and a group adhering to UIT-CI formed a parallel PST.