Muhammad Jamiruddin Sircar[a] (born 1 December 1931) is a Bangladeshi lawyer and politician who served as the acting President of Bangladesh in 2002.

Sircar went on the Supreme Court of Bangladesh to work as a Lawyer in constitutional, civil and criminal laws.

In 1977, he was selected by the then President Ziaur Rahman as a member of the Bangladesh Delegation to the United Nations General Assembly.

In 1981, as a State Minister of Bangladesh Government for the Ministry of Foreign Affairs, he travelled to the UN to make deliberation on Middle East peace process and disarmament.

[12] On 13 April 2009, an Awami League led parliamentary probe body reported that Sircar took 2.7 million taka unlawfully as medical bill without the permission of Prime Minister Khaleda Zia during his tenure as speaker of the parliament.

[4] Apart from his political life, he was the founder of the Barrister Jamiruddin Sircar Collegiate Institute in his birthplace, Panchagarh.