John Rupert Firth (June 17, 1890 in Keighley, Yorkshire – December 14, 1960 in Lindfield, West Sussex), commonly known as J. R. Firth, was an English linguist and a leading figure in British linguistics during the 1950s. He was Professor of English at the University of the Punjab from 1919–1928. He then worked in the phonetics department of University College London before moving to the School of Oriental and African Studies, where he became Professor of General Linguistics, a position he held until his retirement in 1956.