Sir John Batty Tuke PRCPE FRSE LLD (9 January 1835 – 13 October 1913) was one of the most influential psychiatrists in Scotland in the late nineteenth century, and a Unionist Member of Parliament (MP) from 1900 to 1910. Tuke's career in Edinburgh from 1863 to 1910 spanned a period of significant social and political changes in asylum governance and care in Scotland. Tuke's professional success in public and private practice and his powerful role in several prominent medical societies allowed him to influence his colleagues toward a more physiological understanding of mental illness and its treatment.