San Felice Circeo is a town and comune in the province of Latina, in the Lazio region of central Italy.

It is included in the Circeo National Park. Sites include the Grotta Guattari, one of the oldest Neanderthal sites in Italy.

Capo Circeo Lighthouse is 3 kilometres (1.9 mi) from the old town.

In the treaty signed between Carthage and Rome in 509 BC, the Carthaginians agreed not to harm Circeo, then called Circeii.

In 209 BC, during the Second Punic War, Circeii was one of twelve Latin colonies to refuse any more military contributions towards Rome and in 204 it was punished as a result.

The Roman Triumvir Lepidus was exiled here after his fall in 36 BC by his former colleague, and future Emperor, Octavian.