The municipality of Casalnuovo di Napoli contains the frazioni (hamlets) of: Casarea, Tavernanova, Licignano and Talona.

Casalnuovo di Napoli borders the following municipalities: Acerra, Afragola, Casoria, Pollena Trocchia, Pomigliano d'Arco, Sant'Anastasia, Volla, Somma Vesuviana .

At the beginning of the 15th century the village was acquired by the baron Giovanni III de Alexandro, belonging to the House D'Alessandro, who lived between Terra di Lavoro and Naples.

During the administrative redesign wanted by fascism, Licignano, after having been part of different municipalities, became a small fraction of Casalnuovo di Napoli.

in the past, Casalnuovo di Napoli, was one of the main industrial centres of the Neapolitan hinterland, thanks to some companies which had their own factories here.

Among the most important companies, there were: Moneta, Eridania, Colussi and Liquigas and Hensemberger (accumulators industry), whose factories are now almost abandoned.

The majority of the population is of Catholic orientation, but there are also substantial communities of Jehovah's Witnesses and Protestant, and in minimal percentage Sunni Muslims.

Una città che scrive – A project realized with the contribution of the Bureau of the City Council in favour of the image of the City - Antology of 14 authors of Casalnuovo- Literary prize UNA CITTA' CHE SCRIVE- www.unacittachescrive.it - 2018 edition of the Prize: Special section for dyslexia.