Tan Sri Datuk Amar Dr. James Jemut Masing (5 March 1949 – 31 October 2021) was a Malaysian politician who served as the Deputy Chief Minister, State Minister of Infrastructure and Ports Development of Sarawak under Chief Ministers Adenan Satem and Abang Abdul Rahman Johari Abang Openg as well as Member of the Sarawak State Legislative Assembly (MLA) for Baleh from May 2016, January 2017 and December 1983 to his death in October 2021 respectively. He was a member of the Parti Bangsa Dayak Sarawak (PBDS) and later Parti Rakyat Sarawak (PRS), a component party of the ruling Gabungan Parti Sarawak (GPS) coalition. He also served as President of PRS from its founding in March 2004 to his death in October 2021.