Hyginus Gromaticus, (surname from groma, a surveying device) was a Latin writer on land-surveying, who flourished in the reign of Trajan (AD 98–117). Fragments of a work on legal boundaries attributed to him will be found in C. F. Lachmann, Gromatici Veteres, i. (1848).
A treatise on Roman military camps (De Munitionibus Castrorum), was formerly attributed to him, but is probably of later date, about the 3rd century AD. (ed. W. Gemoll, 1879; A. von Domaszewski, 1887) and is now attributed to "Pseudo-Hyginus".