Mninwa Johannes Mahlangu (8 October 1952 â 24 August 2025) was a South African politician and diplomat. He was active in the Bantustan politics of Apartheid-era South Africa, serving as a parliamentarian in the former Lebowa homeland. He was a member of the African National Congress, and served as the Chairperson of the National Council of Provinces from 2004 to 2014, and a member of the Pan-African Parliament.
Between 23 February 2015 and March 2020, he was the South African Ambassador to the United States.
Mahlangu died on 24 August 2025, at the age of 72.