Solomon Blay (20 January 1816 – 20 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 hung over 200 people in the course of a long career spanning from 1840 to 1891. This made him the longest serving hangman in the British Empire.