Siti Ashah binti Ghazali (born 3 October 1962) is a Malaysian politician who has served as Member of the Kedah State Executive Council (EXCO) in the Perikatan Nasional (PN) state administration under Menteri Besar Muhammad Sanusi Md Nor since May 2020 and in the Pakatan Rakyat (PR) state administration under former Menteri Besar Azizan Abdul Razak from March 2008 to the collapse of the PR state administration in May 2013 as well as Member of the Kedah State Legislative Assembly (MLA) for Merbau Pulas since March 2008.
She is a member of the Malaysian Islamic Party (PAS), a component party of the PN and formerly Gagasan Sejahtera (GS), PR and Barisan Alternatif (BA) coalitions.
She received her early education at Sekolah Kebangsaan Jeneri, Sik, from 1969 until 1971 before moving to Sekolah Kebangsaan Cemara, Jeniang.
In 1973, she moved to Sekolah Kebangsaan Paya Mengkuang, Gurun, Kedah.
She then continued her studies at the secondary level at Sekolah Menengah Agama Taufiqiah Khairiah Halimiah, Batu 16, Padang Lumat from 1975 to 1981.