Grumo Nevano is a comune (municipality) in the Metropolitan City of Naples in the Campania region of Italy, with 17,939 inhabitants.

Bordering the Province of Caserta and located 11 km (6.8 mi) north of the Metropolitan City of Naples, Grumo Nevano is an urban municipality of the Campana lowland.

The name of Grumo comes from the Latin grumum, meaning 'cluster' or 'heap' (of houses), whereas the name of Nevano comes from praedium naevianum, which was a property of the Naevia gens.

Grumo Nevano, like all the other municipalities in the northern area of Naples, has Oscan origins.

Some Samnite graves were casually found within the residential area during the 1960s and 1970s and two Latin inscriptions are evident, probably from Atella.