The Socialist Party of Senegal (Parti Socialiste du Sénégal, PS) is a political party in Senegal. It was the ruling party in Senegal from independence in 1960 until 2000. Ousmane Tanor Dieng has been the First Secretary of the party since 1996. The best-known figure of the PS was the late poet and president, Léopold Sédar Senghor.