Mohammad Nizar bin Jamaluddin (born 17 March 1957) is a Malaysian politician and engineer who has served as a member of the Perak State Executive Council since November 2022 under Saarani Mohamad and from May 2018 to March 2020 under Ahmad Faizal Azumu, and as a member of the Perak State Legislative Assembly for Sungai Rapat since May 2018.

During the 2004 general election, Mohammad Nizar Jamaluddin ran for the Kuala Kangsar parliamentary constituency, but was defeated by his opponent Rafidah Aziz.

[7] Following the resolution of this matter, all the state assemblymen from PKR, PAS and DAP (including Lim Kit Siang) attended the Menteri Besar swearing-in ceremony in support of Nizar.

Nizar's administration's decision to grant freehold titles to ethnic Chinese landholders in new village settlements garnered controversy and then-deputy prime minister Najib Razak disputed the act's legality, claiming the jurisdiction lied federally.

[8] His administration was heavily criticised on various issues by the Malaysian mainstream press, especially by Utusan Malaysia and Berita Harian, Malay-nationalist newspapers owned by the United Malays National Organisation (UMNO), a component party of Barisan Nasional[9] and Nizar faced accusations of being a proxy for the DAP.

On 25 January 2009, a Barisan Nasional assemblyman Nasarudin Hashim announced his defection PKR from UMNO, the second largest party in the state's Pakatan Rakyat coalition.

A new state administration was sworn in with Zambry Abdul Kadir serving as the new Menteri Besar, but Nizar rejected the appointment and continued to conduct official duties.