Multiculturalism in Canada was officially adopted by the government during the 1970s and 1980s. The Canadian federal government has been described as the instigator of multiculturalism as an ideology because of its public emphasis on the social importance of immigration. The 1960s Royal Commission on Bilingualism and Biculturalism is often referred to as the origin of modern political awareness of multiculturalism, resulting in Canada being one of the most multicultural nations in the world. The official state policy of multiculturalism is often cited as one of Canada's significant accomplishments, and a key distinguishing element of Canadian identity and Canadian values.

The term multiculturalism has a range of meanings within the contexts of sociology, political philosophy, and colloquial use. In sociology and in everyday usage, it is a synonym for ethnic pluralism, with the two terms often used interchangeably, and for cultural pluralism in which various ethnic and cultural groups exist in a single society. It can describe a mixed ethnic community area where multiple cultural traditions exist or a single country within which they do. Groups associated with an indigenous, aboriginal or autochthonous ethnic group and settler-descended ethnic groups are often the focus.