Bacoli (Italian: [ˈbaːkoli]; Neapolitan: Vacule; Latin: Bauli[3]) is a comune (municipality) in the Metropolitan City of Naples in the Italian region of Campania, located about 15 kilometres (9.3 mi) west of Naples.

Bacoli borders the municipalities of Monte di Procida and Pozzuoli.

In Roman times it was a popular resort almost as famous as the nearby Baiae.

AD: I left that place because there was a danger that if I became too fond of Bauli, all the other places I have left to see would not have pleased me.Several major ancient Roman structures can be seen in Bacoli, including the Piscina Mirabilis, the Cento Camerelle, and the so-called Tomba Agrippina, a theatre belonging to an ancient villa.

The archaeological remains of Baiae are also located in the commune The frazione of Miliscola (from the Latin militum schola) was, in the Roman Empire, the seat of a military school.