Trizinia (Greek Τροιζηνία ( f sg ) ) is a municipality on the Peloponnesian coast of the Saronic Gulf, belonging to the Attic Regional District islands.

The community was formed in the administrative reform 2010 1997 from the formerly independent communities Trizina and Methana. Your head office is located in the hotel opposite the island of Poros Galatas.

Trizinia was until 1997 the name of a province of Attica Prefecture Piraeus district. However, to hers next Trizina Galatas and Poros also.