Lavrion Square-Strofyli railway

Locomotive Γ10 of Attica Railways
Line length	74 km (46 mi)
Track gauge	1,000 mm (3 ft 3 3⁄8 in)

The Lavrion Square-Strofyli railway (Greek: Σιδηροδρομική Γραμμή Πλατείας Λαυρίου - Στροφυλίου Sidirodromiki Grammi Plateias Lavriou - Strofyliou) was a Greek 1,000 mm (3 ft 3 ³⁄₈ in) (metre gauge) railway line that ran from Lavrion Square in downtown Athens to the suburb of Kifissia and further on to Strofyli.

The line opened on February 4, 1885 as single track, metre gauge 1,000 mm (3 ft 3 ³⁄₈ in). Until 1925 the line was operated by Attica Railways (Greek: Σιδηρόδρομοι Αττικής), which also operated the branch from Heraklion to Lavrion. The headquarters of Attica Railways along with a rolling stock depot, repair workshops and goods sidings were located at Attiki station (Greek: Αττική), next to Liossion street.

From downtown Athens to Kifissia station the line followed the alignment of the current ISAP line. The downtown terminal (Lavrion Square) was situated a short distance from Omonoia square. The section from Lavrion Square to Attiki station currently runs underground (along Tritis Septemvriou, Rizou and Agorakritou streets) in a shallow cut-and-cover tunnel, but in the days of Attica Railways (until 1926) it ran at street level as a tramway.

From Kifissia the line was extended north to Strofyli. The section from Athens (Lavrion Square) to Heraklion was 9.2 km long and from Heraklion to Strofyli 7.4 km.