Narrow-gauge railways in Finland

The vast majority of Finnish narrow-gauge railways were owned and operated by private companies. There are only a few instances where narrow-gauge railways were in direct connection with each other, and those interchanges did not last for long. The railways never formed a regional rail traffic network, but were only focused on maintaining connections between the national Russian-gauge railway network and the off-line industries.

Some railways were closed due to competition from the roads, others were converted to Russian gauge.

Common carriers

 * The Lovisa–Wesijärvi railway (1900–1960) that operated an 80 km line between Lahti and Loviisa.
 * The Hyvinkää–Karkkila railway that operated a 46 km line
 * The Jokioinen Railway that operated a 23 km line until 1974, being the last common-carrier narrow-gauge railway in Finland.

Other lines were notably shorter. The common gauges were and, with a few railways built with  and  gauges.

Tourist and heritage lines
Narrow-gauge tourist and heritage lines of gauge and  narrow gauge still operate.
 * Jokioinen Museum Railway,, 14 km, Jokioinen–Minkio–Humpilla.
 * Nykarleby Jernväg,, 2 km.
 * Tankavaara Kultakylä,, opened in 1997.
 * Outokummun Kaivosrautatie,, 1.15 km, former copper mine.

Other

 * Rokua railway,, 3.3 km (2.1 mi), line connecting a hotel with a fitness center