Rideau Hall is the official residence in Ottawa of both the governor general of Canada and the Canadian monarch. It stands in Canada's capital on a 36-hectare (88-acre) estate at 1 Sussex Drive, with the main building consisting of approximately 175 rooms across 9,500 square metres (102,000 sq ft), and 27 outbuildings around the grounds. Rideau Hall's site lies outside the centre of Ottawa. It is one of two official vice-regal residences maintained by the federal Crown, the other being the Citadelle of Quebec.

The monarchy of Canada is Canada's form of government embodied by the Canadian sovereign and head of state. It is one of the key components of Canadian sovereignty and sits at the core of Canada's constitutional federal structure and Westminster-style parliamentary democracy. The monarchy is the foundation of the executive (King-in-Council), legislative (King-in-Parliament), and judicial (King-on-the-Bench) branches of both federal and provincial jurisdictions. The current monarch is King Charles III, who has reigned since 8 September 2022.