The Monarchist League of Canada is a Canadian nonprofit monarchist advocacy organization. This league promotes its aims in three areas: education, advocacy, and research. Local branches and many under the patronage of lieutenant governors, complement these areas of focus by acting as a grassroots rallying point for members.

In Canada, a lieutenant governor is the representative of the King of Canada in the government of each province. The Governor General of Canada appoints the lieutenant governors on the advice of the Prime Minister of Canada to carry out most of the monarch's constitutional and ceremonial duties for an unfixed period of time—known as serving "His Excellency’s pleasure"—though five years is the normal convention. Similar positions in Canada's three territories are termed "Commissioners" and are representatives of the federal government, not the monarch directly.