Massa di Somma (Neapolitan: Massa 'e Somma) is a comune (municipality) in the Metropolitan City of Naples in the Italian region of Campania, located about 10 kilometres (6.2 mi) east of Naples.

Massa di Somma borders the following municipalities: Cercola, Ercolano, Pollena Trocchia, San Sebastiano al Vesuvio.

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