Socialist Workers' Party (Finnish: Sosialistinen Työväenpuolue, Swedish: Socialistiska Arbetarepartiet) was a political party in Finland. The STP was founded in 1973 as split from Social Democratic Union of Workers and Smallholders (TPSL). STP emerged out of a group that did not approve of the return of TPSL to the Social Democratic Party.
STP had electoral alliances with Finnish People's Democratic League (SKDL), the mass front dominated by the Communist Party of Finland (SKP) but with little success. When SKP (and SKDL) split in 1985-1986 STP cooperated with Democratic Alternative which was founded by Communist Party of Finland (Unity) (SKPy).
- Mitä missä milloin 1975 (Otava 1974), p. 178.
- Marja Haapio & Matti Virtanen: Vasemmistoliiton "torikokous" kerää monenlaisia sosialisteja (Helsingin Sanomat 8.2.1990)
- STP party program (1973) (in Finnish)