| Mninwa Johannes Mahlangu | |
| Ambassador From: | South African |
| Country: | the United States |
| President: | Jacob Zuma Cyril Ramaphosa |
| Term Start: | 23 February 2015 |
| Term End: | March 2020 |
| Predecessor: | Ebrahim Rasool |
| Successor: | Nomaindiya Mfeketo |
| Office1: | Chairperson of the National Council of Provinces |
| President1: | Thabo Mbeki |
| Term Start1: | 21 November 2004 |
| Term End1: | 21 May 2014 |
| Predecessor1: | Joyce Kgoali |
| Successor1: | Thandi Modise |
| Birth Name: | Mninwa Johannes Mahlangu |
| Birth Date: | 1952 10, df=yes |
| Party: | African National Congress |
| Spouse: | Nomaswazi Christina Mahlangu |
| Alma Mater: | Damelin |
Mninwa Johannes Mahlangu (born 8 October 1952) is 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 is currently a member of the African National Congress, and served as the Chairperson of the National Council of Provinces from 2004 to 2014,[1] and a member of the Pan-African Parliament.
Between February 23, 2015 and March, 2020, he was the South African Ambassador to the United States.[2]