Adama Dieng (born 22 May 1950, Senegal) is a former UN Special Adviser on the Prevention of Genocide[1] succeeded by Alice Wairimu Nderitu of Kenya.

He then served as Legal Officer of Africa for the International Commission of Jurists from 1982 to 1989, Executive Secretary (1989–1990) and Secretary-General from October 1990 to May 2000.

UN Secretary-General Kofi Annan appointed him in January 2001 as the Registrar of the International Criminal Tribunal for Rwanda.

He has worked as a consultant for many international organizations including UNITAR, the Organisation of African Unity, the Ford Foundation, UNESCO, the Organisation internationale de la Francophonie, the United Nations and the International Committee of the Red Cross.

Dieng, a Muslim, strongly criticized the Cairo Declaration on Human Rights in Islam, saying, among other things, that it introduced "intolerable discrimination against both non-Muslims and women".