Sellia Marina is a town and comune in the province of Catanzaro, in the Calabria region of southern Italy. It is located in the southern part of the country, within the administrative area centred on the city of Catanzaro.
As a comune, Sellia Marina is one of the local administrative units into which the province of Catanzaro and the Calabria region are organised. It is a coastal settlement on the Ionian Sea, a characteristic it shares with several other towns along this stretch of the Calabrian coast.