Alexis Mousseau (December 5, 1767 – January 28, 1848) was a farmer and political figure in Lower Canada.
He represented Warwick from 1820 to 1824 and from 1827 to 1830 and Berthier from 1830 to 1838 in the Legislative Assembly of Lower Canada.
He was born in Berthier, Lower Canada, the son of Jean-Baptiste Mousseau and Marie-Catherine Laferrière.
His daughter Geneviève married Pierre-Eustache Dostaler.
His grandson Omer Dostaler served in the provincial assembly and his grandsons Joseph-Alfred Mousseau and Joseph Octave Mousseau were members of the Canadian House of Commons.