Communist Party in Saudi Arabia, political party in Saudi Arabia. CPSA was formed in 1975. It had its origins in the Arab Nationalist Movement.

CPSA was always illegal and persecuted by the regime.

CPSA had a youth organization, the Union of Democratic Youth - Saudi Arabia (Itihad ash-Shabaab ad-Dimokrati fi Saudia), with office in Damascus, Syria.

In the beginning of the 1990s the regime released the political prisoners of CPSA in exchange that the party promised to disband.