A member of the Gens Nummii, Nummius Tuscus was probably the son of Marcus Nummius Tuscus, the consul of AD 258. He himself was appointed consul prior alongside Gaius Annius Anullinus in AD 295. Sometime between 295 and 302, Nummius Tuscus served as the proconsular curator of Aquarum et Miniciae; this was followed by his appointment as Praefectus Urbi of Rome, a position he held from 19 February 302 until 12 September 303.
- Chastagnol, André, Les Fastes de la Prefecture de Rome au Bas-Empire (1962)
- Martindale, J. R.; Jones, A. H. M, The Prosopography of the Later Roman Empire, Vol. I AD 260-395, Cambridge University Press (1971)