Joniston Bangkuai (born 17 April 1961) is a Malaysian politician who has served as the State Assistant Minister of Tourism, Culture and Environment of Sabah in the Gabungan Rakyat Sabah (GRS) state administration under Chief Minister Hajiji Noor and Minister Jafry Ariffin since October 2020 and Member of Sabah State Legislative Assembly (MLA) for Kiulu since May 2013. He is a member of the United Sabah Party (PBS) which is aligned with the ruling Perikatan Nasional (PN) and GRS coalitions. He has served as the Information Chief of PBS since July 2022 and Secretary-General of PBS from January 2021 to July 2022.