Albert William Atwater (May 19, 1856 – November 2, 1929) was a Canadian politician.

Born in Montreal, the son of Albert William Atwater and Julia Eliza Brush, Atwater was educated at the Montreal High School and McGill University.

He was called to the Quebec Bar in 1881 and was created a Queen's Counsel in 1889.

A lawyer, he was a member of the Montreal City Council for Saint-Antoine from February to May 1896.

He was elected with opposition to the Legislative Assembly of Quebec in an 1896 by-election for the riding of Montréal division no.