Asa Allworth Burnham (1808 – May 10, 1873) was an Ontario farmer and political figure.
He was born in Cobourg, Upper Canada in 1808, the son of Asa Burnham who was one of the first settlers in the area.
In 1832, Burnham married Elizabeth, the daughter of Samuel Street Wilmot.
He was elected to the Legislative Council for Newcastle district in 1863 and served until Confederation, when he was named to the Senate.
His uncle Zacheus Burnham, who also lived in Cobourg, served in the legislative assembly and council of Upper Canada.