This study of William Perkins’ thought on grace and free choice places his thought in the variegated tradition of the Reformation as established by writers like Calvin, Vermigli, Bullinger, and Musculus. More specifically, his thought can be placed in the version of that tradition exemplified in the Thirty-Nine Articles of the Church of England and in the Elizabethan Settlement. Closer examination of Perkins’ thought in its context yields a window on the more technical understanding of the relationship of divine grace to human knowing and willing, which demonstrates its eclectic reception of late medieval scholasticism, its elaboration of the work of the Reformers, and its distance from modern theories of compatibilist and libertarian freedom. This work traces Perkins’ views on the nature of free will both as created and in the fallen and regenerate states of humanity, correlating them with the views of Reformed contemporaries, and lining out the issues that they sought to address.