William Jaffray (born 1868, date of death unknown) was a Canadian politician who served in the Legislative Assembly of Alberta. He represented the electoral district of Edmonton from 1913 to 1917 as a member of the Liberal party.
Jaffray was elected in the 1913 Alberta general election, defeating incumbent Conservative candidate John Alexander McDougall. He served a single term and did not seek re-election in the 1917 Alberta general election. Little further information is readily available regarding his life, political career after his term, or profession.
