Tania Leon, born Ruth Naomi Leon, (Wellington, May 4, 1945 – Nigtevecht, August 15, 1996) was a South African born teacher and women's activist.
She was a member of the anti-apartheid movement in the Netherlands and of the Dutch unit of the ANC.
Leon trained as a teacher and in the academic year 1960–1961 she obtained her "lower primary teacher's certificate" at the Athlone Institute in Paarl, South Africa.
From January 1969 to June 1972 she worked as a teaching assistant at the Mountain River High School in Wellington.
She became a Dutch citizen in1984, Leon worked from August 1986 to 1989 at the Foundation for Women and Informatics in Amsterdam, as well as a lecturer at the Women's School of Informatics from August 1987.