William Arthur Deacon (6 April 1890 — 5 August 1977) was a Canadian literary critic and editor.
Deacon was in Pembroke, Ontario on 6 April 1890.
He studied in Winnipeg, Manitoba to be a lawyer, but eventually became a book review editor, and "aimed to become the first full-time book reviewer in Canada".[1] He worked for the Winnipeg Free Press (1921), Saturday Night (1922–28), The Mail and Empire (1928–36) and The Globe and Mail (1936–61). He died on 5 August 1977 in Toronto.[2]