Prime Minister (Portuguese: primeiro-ministro) is the current title of the head of government of Portugal. As head of government, the Prime Minister coordinates the action of ministers, representing the Government of Portugal from the other bodies of state, accountable to Parliament and keeps the President informed. The Prime Minister can accumulate the role of head of government with the portfolio of one or more ministries.

The Prime Minister of the Portuguese Republic (primeiro-ministro, or ) is the head of the country's Government. He/she coordinates the actions of all ministers, represents the Government as a whole, reports his actions and is controlled by the Assembly of the Republic, and keeps the President of the Republic informed.