Siti Aminah binti Aching (born 25 March 1962) is a Malaysian politician who has served as the Member of Parliament (MP) for Beaufort since November 2022. She served as the Deputy Minister of Plantation and Commodities in the Unity Government administration under Prime Minister Anwar Ibrahim and Minister Fadillah Yusof from December 2022 to December 2023. She is a member and the Division Women Chief of Beaufort of the United Malays National Organisation of Sabah (Sabah UMNO), a branch of a component party of the Barisan Nasional (BN) coalition. Siti Aminah was the first Bisaya to join the government as a deputy minister in the history of Malaysia.