Marigliano is a town and comune of the Metropolitan City of Naples, Campania, southern Italy.

Nearby towns include: Acerra, Brusciano, Mariglianella, Nola, San Vitaliano, Scisciano, Somma Vesuviana.

In October 2000, the Italian Parliament approved the findings of a commission which studied Camorra activities in Campania.

Majority of the waste was dumped in the region between Marigliano, Acerra, and Nola, referred to as the "Triangle of Death".

A 2004 study by Alfredo Mazza published in The Lancet Oncology revealed that deaths by cancer in the area are much higher than the European average.