Antoine Joseph Léger (October 16, 1880 – April 7, 1950) was a lawyer, author and political figure of Acadian descent in New Brunswick.

Antoine Léger ran unsuccessfully for a seat in the Legislative Assembly of New Brunswick in 1917 but won in the 1925 New Brunswick general election as a declared candidate in the Westmorland County Electoral District for the then unofficial Progressive Conservative Party.

On September 14, 1925, new Premier John B. M. Baxter appointed him to his Cabinet as the Provincial Secretary-Treasurer (Minister of Finance).

On August 14, 1935, Canadian Prime Minister Richard B. Bennett appointed Antoine Léger to the Senate of Canada.

Léger published Les grandes lignes de l'histoire de la Société l'Assomption, the history of an Acadian association, and wrote articles on Acadian history as well as several historical novels.