Poseidonia (disambiguation)
# Poseidonia (disambiguation)

Poseidonia is a village and a former municipality on the island of Syros, Cyclades, Greece.

Poseidonia may also refer to:

## Places

* Poseidonia, Isthmus of Corinth, Greece, a harbour on the western end of the Corinth Canal
* Poseidonia (Magna Graecia), a ruined Ancient Greek and Roman city in southern Italy
* Basaidu, a village in Hormozgan, Iran
* Poseidonia, a mythical name for Athens from the Ancient Greek myth The Gift of Athena, the myth of the founding of Athens

## Other uses

* An Ancient Greek festival celebrating the sea god Poseidon
* The realm of the Ancient Greek sea god Poseidon
* Posidonia, a sea grass genus, also called Poseidonia
* Thambemyia poseidonia, species of fly, also called Conchopus poseidonius
* Innisfallen (ship) (1948), a ship named Poseidonia from 1967 to 1985
* MV Ulster Queen (1967), a ship named Poseidonia from 1988 to 2005
