Châteauguay was a federal electoral district in Quebec, Canada, that was represented in the Canadian House of Commons from 1867 to 1917 and from 1979 to 2004.
It was created by the British North America Act of 1867. In 1914, it was amalgamated with Huntingdon to become Châteauguay—Huntingdon riding.
The riding was recreated in 1976 from portions of Laprairie and Beauharnois—Salaberry ridings. It consisted of:
the Towns of Châteauguay, Châteauguay-Centre, Delson, Léry, Mercier, Sainte-Catherine, Saint-Constant and Saint-Rémi;
in the County of Châteauguay: the parish municipalities of Sainte-Clothilde, Sainte-Martine and Saint-Urbain-Premier; the municipality of Saint-Paul-de-Châteauguay;
in the County of Laprairie: the parish municipality of Saint-Isidore; the municipality of Saint-Mathieu; the Indian Reserve of Caughnawaga No. 14; and
in the County of Napierville: the parish municipalities of Saint-Michel and Saint-Rémi.
In 1987, it was redefined to consist of:
the Towns of Châteauguay, Delson, Mercier, Sainte-Catherine, Saint-Constant and Saint-Rémi;
in the County of Laprairie: the parish municipalities of Saint-Isidore, Saint-Jacques-le-Mineur and Saint-Philippe; the Municipality of Saint-Mathieu; the Indian Reserve of Kahnawake No. 14; and
in the County of Napierville: the parish municipalities of Saint-Édouard, Saint-Michel and Saint-Patrick-de-Sherrington.
In 1996, it was redefined to consist of:
the cities of Châteauguay, Delson, Léry, Mercier, Saint-Constant, Saint-Rémi and Sainte-Catherine;
the County Regional Municipality of Roussillon, including Kahnawake Indian Reserve No. 14 (Caughnawaga), excepting: the cities of Candiac and La Prairie; the Parish Municipality of Saint-Philippe; and
in the County Regional Municipality of Les Jardins-de-Napierville: the parish municipalities of Saint-Édouard, Saint-Jacques-le-Mineur and Saint-Michel.
It was abolished in 2003 when it was redistributed into Beauharnois—Salaberry, Saint-Jean and Châteauguay—Saint-Constant ridings.
This riding elected the following Members of Parliament:
By-election: On Mr. Holton's death, 14 March 1880
By-election: On Mr. Brown's death, 30 May 1913
