Lagonisi is a coastal settlement located in the southeastern part of the Attica region, along the Saronic Gulf. It is situated relatively close to Athens, making it a popular seaside destination within commuting distance of the capital.

The area is well known for its beaches, clear waters, and rocky coves, combined with organized seaside facilities, private residences, and tourism infrastructure. Lagonisi has developed into an upscale residential and holiday area, attracting both permanent residents and seasonal visitors.

Today, Lagonisi is considered one of the more desirable coastal locations in Attica. It offers a blend of natural seaside beauty, modern amenities, and proximity to Athens, making it popular for swimming, relaxation, and summer tourism.