Valin v Langlois arose from a controverted election in the riding of Montmorency, in the federal general election of 1878. The riding of Montmorency was located in the rural area outside Quebec City. Jean Langlois was the member for Montmorency from 1867 to 1878, and contested the seat again in the 1878 election. Pierre-Vincent Valin was his opponent in 1878. Valin was declared the winner, but Langlois challenged the election result in the Quebec Superior Court under the Dominion Controverted Elections Act, 1874.
