Margaret Natalie Mensah-Williams (born 25 December 1961) is a Namibian politician, diplomat, and prominent SWAPO member.

Mensah-Williams also served as a councillor of Windhoek's Khomasdal North constituency from 1998 until 2019, and from this position was elected to represent Khomas Region in the National Council, the upper house of the Namibian Parliament from 2015 to 2019.

She resigned from all regional representative positions prior to the 2019 Namibian general election in order to contest for a seat in the National Assembly, Namibia's lower house, and subsequently became a member of Parliament.

[2] Mensah-Williams ventured into politics during her time as a student at the University of Cape Town where she was involved in organising protest marches against the apartheid regime both in her native Namibia and in South Africa.

[1][3] She was subsequently selected to represent Khomas Region in the National Council, and in 1999 she became its vice-chairperson (Deputy Speaker), the first woman to be elected to a major decision-making position in Namibia.