The Canadian Museum of Immigration at Pier 21, in Halifax, Nova Scotia, is Canada's national museum of immigration. The museum occupies part of Pier 21, the former ocean liner terminal and immigration shed from 1928 to 1971. Pier 21 is Canada's last remaining ocean immigration shed. The facility is often compared to Ellis Island (1892–1954), in terms of its importance to mid-20th-century immigration to Canada an association it shares with 19th century immigration history at Grosse Isle, Quebec (1832–1932) and Partridge Island in Saint John, New Brunswick (1785–1941). The museum began as an independent institution run by the Pier 21 Society in 1999. It became a national museum run by the Canadian federal government in 2011.

Halifax is the capital and most populous municipality of the Canadian province of Nova Scotia, and the most populous municipality in Atlantic Canada. As of 2022, it is estimated that the population of the Halifax CMA was 480,582, with 348,634 people in its urban area. The regional municipality consists of four former municipalities that were amalgamated in 1996: Halifax, Dartmouth, Bedford, and Halifax County.