Narrow-gauge railways in Slovenia

Most Slovenian railway lines were built during the Austro-Hungarian Empire.

Overview
 gauge  gauge
 * Ljubljana tram system; 18,5 km, 1901-1958
 * Poljčane - Zreče; 20,8 km, closed.
 * Piran tram system; 5 km 750 V DC electrified tram, 1907-1952
 * Parenzana railway; Triest - Škofije - Sečovlje border - Poreč, 33 km, 1902-1935.

 gauge
 * Kobarid - Pojana border - Cividale del Friuli, 9 km, Società Veneta 1915-1932

 gauge
 * Postojna Cave railway in Postojna; 2,5 km double track, opened in 1872.

 gauge
 * Brestanica to the north; 6 km, closed construction railway.