Louis Lagueux was elected to the Legislative Assembly of Lower Canada after studying law; his grandfather and uncle also served in the legislative assembly in Canada.
In 1820, he was elected to the Legislative Assembly of Lower Canada for Dorchester; he represented the riding until his death at Quebec from cholera in 1832. He was born in the town of Quebec in 1793, the son of merchant Louis Lagueux and Louise Begin, whose father Charles Begin served in the legislative assembly. His uncle Etienne-Claude Lagueux also served in the legislative assembly. Lagueux studied at the Petit Seminaire de Quebec, articled in law with Joseph-Remi Vallieres de Saint-Real and qualified to practice in 1817. 
