Tun Dr. Siti Hasmah binti Haji Mohamad Ali (Jawi: سيتي حسمه بنت محمد علي; born 12 July 1926) is a Malaysian doctor and former chancellor of the Multimedia University (MMU).

[4] As a doctor in Kedah, she actively promoted public and rural health by organizing initiatives to improve hygiene, encourage healthy lifestyles, and provide immunizations for children.

[5] Siti Hasmah was born on 12 July 1926 in Klang, Selangor, as an ethnic Malay (retired) physician of Minangkabau descent from Negeri Sembilan, Malaysia.

Her elder brother, Ismail Mohamed Ali, served as the second Governor of Bank Negara Malaysia from 1962 to 1980 and was the inaugural chairman of Permodalan Nasional Berhad (PNB).

[15] Siti Hasmah used her position as the wife of the Prime Minister to advocate for women's health, family planning, drug abuse control, and adult literacy.

[16] She also served in various positions as follows: As Patron of the Pan Pacific South Asia Women's Association, (PPSEAWA) Malaysia, Siti Hasmah attended and presented keynote addresses at the Triennial Conferences in Tokyo (1984), Bangkok (1991) and Tonga (1994).

[21] In March 2000, Siti Hasmah led a Malaysian delegation on a five-day goodwill visit to Iraq to assess the impact of economic sanctions on women and children.

[22] She later recalled that the meeting was kept secret until it occurred, even from her security team and Mahathir, and that during their conversation, Saddam expressed gratitude to Malaysia for its support in efforts to lift the sanctions.

[24] Later in November, she launched Malaysia's first 24-hour bookstore, BookXcess Cyberjaya, where she signed a plaque inscribed with the words: ‘A book warrior and a true believer in the power of reading’.

[39] On 18 August 1995, Siti Hasmah received a honorary Doctorate of Education from Universiti Malaya for her enormous and endless contributions in championing the cause of women in the country.

[41] On 15 August 2002, Siti Hasmah was conferred the Companion of Honour award by the Malaysian Association of Chartered Institute of Marketing, its first woman recipient.

[42] On 28 August 2003, Universiti Malaysia Sarawak (Unimas) awarded Siti Hasmah an honorary Doctorate in Science in recognition of her significant contributions to the nation, particularly in rural healthcare and women's empowerment.

[49] On 3 October 2009, Siti Hasmah was awarded an honorary doctorate by Universiti Teknikal Malaysia Melaka (UTeM) for her contributions to national development, while Mahathir received the same honor.

[51] On 13 November 2018, Siti Hasmah was honored with the Distinguished Alumni Service Award by the National University of Singapore (NUS), which recognized her as a “global icon to pioneer and inspire women worldwide”.

[58][59] In addition, the Malaysian AIDS Foundation established the Dr Siti Hasmah Award in 1996 to recognize individuals and organizations whose work has made a significant impact on HIV/AIDS awareness and prevention in Malaysia.

She was portrayed by Erra Fazira in the theater Mahathir, the Musical (2010) and in Teater Tun Siti Hasmah (2012), a Malaysian play directed by Erma Fatima and starring Lisa Surihani, Eja, Nazim Othman, and Esma Danial.

She was also portrayed in two films—by Fadhilah Mansor in Kapsul (2015) and by Fauziah Latiff in Mahathir: The Journey (2022 or 2023, as it was shot in 2019 and early 2020 before the Movement control order COVID-19 pandemic in Malaysia.