Post-war immigration to Australia deals with migration to Australia in the decades immediately following World War II, and in particular refers to the predominantly European wave of immigration which occurred between 1945 and the end of the White Australia policy in 1973. In the immediate aftermath of World War II, Ben Chifley, Prime Minister of Australia (1945–1949), established the federal Department of Immigration to administer a large-scale immigration program. Chifley commissioned a report on the subject which found that Australia was in urgent need of a larger population for the purposes of defence and development and it recommended a 1% annual increase in population through increased immigration.
The first Minister for Immigration, Arthur Calwell, promoted mass immigration with the slogan "populate or perish". It was Billy Hughes, as Minister for Health and Repatriation, who had coined the "populate or perish" slogan in the 1930s. Calwell coined the term "New Australians" in an effort to supplant such terms as Balt, pommy and wog.