A plebiscite on conscription was held in Canada on 27 April 1942. It was held in response to the Conservative Party lobbying Mackenzie King to introduce compulsory overseas military service, the government having previously promised not to introduce same in 1940. The result was 66% voting in favour, with Quebec being the only province to have a majority voting against. Quebec's strong majority against the commitment's release prompted Mackenzie King not to pursue the issue until later events prompted a change in position.
The referendum was held in all 245 electoral districts, which covered all nine provinces and one of the two territories. Residents in the Northwest Territories did not have a vote, as their area was not organized as an electoral district.