Elefsina, also known as Eleusis, is a suburban city and municipality situated within the Athens metropolitan area in Attica, Greece. It is located in the regional unit of West Attica, specifically positioned in the Thriasio Plain at the northernmost end of the Saronic Gulf.
The city is bordered by several neighboring towns, with Mandra and Magoula located to its north and Aspropyrgos situated to the northeast. It serves as a key geographic point within the regional infrastructure of the Attica region.