Louis Lacoste

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The Hon.

Louis Lacoste
Senator for Montarville, Quebec
In office
October 23, 1867 – November 26, 1878
Appointed byRoyal Proclamation
Succeeded byCharles Boucher de Boucherville
Personal details
Born(1798-04-03)April 3, 1798
Boucherville, Lower Canada
DiedNovember 26, 1878(1878-11-26) (aged 80)
Boucherville, Quebec
Political partyConservative
ChildrenAlexandre Lacoste

Louis Lacoste (April 3, 1798 – November 26, 1878) was a Quebec notary and political figure. He was a Conservative member of the Senate of Canada from 1867 to 1878.

He was born in Boucherville in 1798. He studied law and became a notary, practicing in Boucherville. In 1834, he was elected to represent the county of Chambly in the Legislative Assembly of Lower Canada, serving until 1838. He supported Louis-Joseph Papineau and was arrested in December 1837; he was released in July 1838. He was elected to the Legislative Assembly of the Province of Canada for Chambly in an 1843 by-election; he was reelected in 1844. He did not run in 1848 but was elected again in an 1849 by-election and reelected in 1851. He was elected again in 1858 and resigned in 1861 to run for a seat in the Legislative Council for Montarville division in 1861. He served until Confederation, when he was named to the Senate.

He died in Boucherville in 1878 while still in office.

He was the father of Alexandre Lacoste, who also became a member of the Senate.


  • "Biography". Dictionnaire des parlementaires du Québec de 1792 à nos jours (in French). National Assembly of Quebec.
  • "Louis Lacoste". Dictionary of Canadian Biography (online ed.). University of Toronto Press. 1979–2016.
  • Louis Lacoste – Parliament of Canada biography