John Ayloffe (c. 1645 – 30 October 1685) was an English lawyer, political activist, and satirist, described as "one of the most consistently committed radicals of the century". According to his contemporary and political opponent Sir Roger L'Estrange, there were few 'more daring men for a desperate exploit'. When James became king in 1685, he joined Argyll's Rising, a Scottish attempt to overthrow him; he was captured and executed in London on 30 October 1685.