Solomon Blay (20 January 1816 – 18 August 1897) was an English convict transported to the Australian penal colony of Van Diemen's Land (present-day Tasmania).
Once his sentence was served, he gained notoriety as a hangman in Hobart, and is believed to have hanged over 200 people in the course of a long career spanning from 1837 to 1887.
This made him the longest serving hangman in the British Empire.