PCO is the department that provides public service support to the Prime Minister, to Ministers within the Prime Minister's portfolio, and to the Cabinet in order to facilitate the smooth and effective operation of the Government of Canada.

A central agency that serves as the secretariat to the Privy Council, responsible in particular for coordinating the business of Cabinet.

Privy Council Office (PCO) is a branch of the Government of Canada (GoC) that serves Canada and Canadians by providing the best non-partisan advice and support to the Prime Minister and Cabinet.

The Privy Council Office provides secretarial and administrative support to the Lord President of the Council in his or her capacity of president of Her Majesty's Most Honourable Privy Council. The head of the Office is the Clerk of the Privy Council.

In Canada the Privy Council Office (French: Bureau du Conseil privé) is the secretariat of the federal cabinet and the department of the Prime Minister. It provides non-partisan advice and support to the Prime Minister and leadership, coordination and support to the departments and agencies of the government.