Väinö Tanner (12 March 1881 – 19 April 1966; surname until 1895 Thomasson) was a leading figure in the Social Democratic Party of Finland, and a pioneer and leader in the cooperative movement in Finland.
Väinö Tanner (12 Maret 1881 – 19 April 1966; nama belakang sampai 1895 Thomasson) adalah seorang figur utama dalam Partai Demokratik Sosial Finlandia, dan pionir dan pendiri gerakan kooperatif di Finlandia.