Western alienation, in the context of Canadian politics, refers to the notion that the Western provinces—British Columbia, Alberta, Saskatchewan and Manitoba—have been marginalized within Confederation, particularly compared to Ontario and Quebec, Canada's two largest provinces. Expressions of western alienation frequently allege that those provinces are politically over-represented and receive out-sized economic benefits at the expense of western Canadians.

The politics of Canada functions within a framework of parliamentary democracy and a federal system of parliamentary government with strong democratic traditions. Canada is a constitutional monarchy where the monarch is head of state. In practice, executive authority is entrusted to the Cabinet, a committee of ministers of the Crown chaired by the Prime Minister of Canada that act as the executive committee of the King's Privy Council for Canada and are responsible to the democratically elected House of Commons.