Alexandre-Joseph Doucet (November 1, 1880 – July 28, 1951) was a farmer and political figure in New Brunswick, Canada.
He represented Kent in the House of Commons of Canada from 1923 to 1926 as a Conservative.He was born in Grand Étang, Nova Scotia, the son of Joseph-Romuald Doucet and Sophie Le Blanc.
Doucet was a farmer at Notre-Dame, Kent County.
In 1903, he married Philomène Le Blanc.
Doucet ran unsuccessfully for a seat in the House of Commons in 1921.