Abang Abu Bakar bin Abang Mustapha[citation needed] (Jawi: ابڠ ابو بكر بن ابڠ مصطفى; 28 June 1941 – 4 December 2023) was a Malaysian politician who was Minister in the Prime Minister's Department from 1999 to 2003 and a Member of Parliament for Kuala Rajang, Sarawak.
His later education was at King's College, Warrnambool, Australia, University of Adelaide, South Australia and Inner Temple, London and International Management Centre for his MBA which he received in 1990.
Abu Bakar was the Managing Director of Progressive Insurance Sdn Bhd, Executive Secretary of Sarawak Alliance Party in 1970, MLA for Kuching Barat (1973–1981) and Satok (1979–1981).
He was also the Speaker of the State Council from 1976 to 1981, Member of Parliament for Paloh (1981–1990) and Kuala Rajang (1990–2000).
From 1988 to 1998, he was the Deputy President of Parti Pesaka Bumiputera Bersatu.