William Johnston Almon (27 January 1816 – 19 February 1901) was a Nova Scotian physician and Canadian parliamentarian.
Almon was also a pivotal figure in the establishment of the first hospital in Halifax, and helped found, and served three terms as president of, the Medical Society of Nova Scotia.
As an alumnus of King's College, Almon created the Welsford Testimonial (Almon-Welsford Testimonial) after the fallen Crimean War Hero (See the Welsford-Parker Monument), the President of the University presents it to the successful candidate every year.
Almon assisted in helping confederate sympathisers escape justice in the Chesapeake Affair during the American Civil War.
Although he did not stand again in 1874, he was on 15 April 1879 appointed to the Senate of Canada on the recommendation of Sir John A. Macdonald.