The 1940 National Registration resulted from the compulsory registration of all adults in Canada from 1940 to 1946. This information was originally obtained under the authority of the National Resources Mobilization Act and the War Measures Act to permit the mobilization of all the human and material resources of the nation for the purpose of the defence and security of Canada. The records are in the custody of Statistics Canada.
The registration included all persons who were 16 years of age or older, except for members of the armed forces and religious orders, or those confined to an institution. If a person died between 1940 and 1946, their questionnaire was destroyed.