National-Unity is the banner under which Robert Rae Manville stood as a candidate in Prince Albert in the 1940 federal election in Canada. The Liberal candidate in the riding was Prime Minister William Lyon Mackenzie King and Manville, a merchant, placed second with 7,534 votes and 41% of the vote, less than 1,000 votes behind the Prime Minister.
Manville was endorsed by the "National Government" which was the name the Conservative Party used in the 1940 election under the leadership of Robert Manion. There was no Social Credit candidate in Prince Albert while there was a Social Credit-National Unity candidate in nearby Saskatoon City. It is unclear if Manville ran as a "National Unity" candidate because he was also endorsed by Social Credit.