Oplontis is an ancient Roman archaeological site located in the town of Torre Annunziata, south of Naples in the Campania region of southern Italy. The excavated site comprises two Roman villas, the best-known of which is Villa A, the so-called Villa Poppaea.

Like the nearby towns of Pompeii and Herculaneum, Oplontis was buried in ash during the volcanic eruption of Mount Vesuvius in 79 AD. However, the force of the eruption was even stronger than at these cities as not only roofs collapsed, but walls and columns were broken and pieces thrown sideways.