The Prime Minister's Office (PMO; ; 总理公署; ) is the executive branch of the Government of Singapore responsible for overseeing the other ministries and political matters that are of great importance to the nation, such as tackling corruption and holding elections. It is headed by the prime minister and other appointed ministers. The PMO is located in The Istana, which is also the official residence and office of the President of Singapore. In Singapore, a Member of Parliament (MP) appointed as 'Minister in the Prime Minister's Office' was previously known as 'Minister without Portfolio', an official cabinet appointment title under the Westminster parliamentary system.

Statutory boards

The PMO oversees three statutory boards;