Petrus Johannes "Pieter" Groenewald (born 27 August 1955) is a South African politician who has been serving as the Leader of the Freedom Front Plus since his election in November 2016.
He started his political career by being elected Mayor of Stilfontein in 1988.
He relinguished the position in 1989 due to his election to the House of Assembly.
Groenewald co-founded the Freedom Front in 1994, and served as an Member of the National Assembly until his election to the North West Provincial Legislature in 1999.
He soon returned to the National Assembly in 2001.