The gens Numicia was an ancient patrician family at Rome.
The first of the Numicii to appear in history was Titus Numicius Priscus, consul in 469 BC.
Members of this gens are first mentioned down to imperial times, and the nomen Numicius is regularly confused with Numisius, which was probably nothing more than a different form of the same gentile name.
[1] The nomen Numicius appears to belong to a class of gentilicia formed from other names ending in -ex, -icis, or -icus, which took -icius as a suffix.
[2] The only surname of the Numicii in Republican times is Priscus, a common cognomen meaning "old, ancient", or "antique".