Thomas Robert Shannon Broughton, FBA (/ˈbrɔːtən/; 17 February 1900 – 17 September 1993) was a Canadian classical scholar and leading Latin prosopographer of the twentieth century.

[4] Broughton's main scholarly work was his massive, three-volume Magistrates of the Roman Republic (commonly abbreviated MRR), published from 1951 to 1986 and requiring more than 30 years to complete.

[5] The project provides an unparalleled accounting of the names of men elected to office during the Roman Republic and has become a standard reference work.

[6] Broughton's career included a variety of academic appointments and awards: visiting professor at Johns Hopkins University, Simon F. Guggenheim Memorial Foundation Fellow, holder of a Fulbright research grant to Italy and professor in charge of the School of Classical Studies of the American Academy in Rome.

After Broughton's death in September 1993, a Colloquium was organised for November 1994 at the University of North Carolina at Chapel Hill in honour of his memory.

Wiseman, Erich S. Gruen, and Ernst Badian, later formed the basis of the honorific volume Imperium Sine Fine: T. Robert S. Broughton and the Roman Republic, edited by J.