The Nesttun–Os Line (Norwegian: Nesttun–Osbanen) was a narrow gauge railway between Nesttun, now part of Bergen, and the community of Osøyro in Os municipality, Norway.

Despite a boom caused by World War I, the railway was eventually driven out of business by competition from road transport, which provided faster service.

Initial plans called for slightly longer route via Os, Samnanger, Norheimsund and Granvin.

[4] At the same time, the physician Daniel Schumann Krüger started to popularize the possibility of building a connection from Nesttun to Osøren (now Osøyro).

At the time it was popular to build tracks along existing roads and use slow locomotives, and Krüger at first proposed such a solution, but later determined to support a conventional railway.

In 1888, an engineer from the state investigated the route, and recommended that the line be built via Rådal to increase the population which it would serve.

[6] Engineer Nicolay Nicolaysen Sontum started planning the cheaper railway in 1889, and he estimated the cost to NOK 500,000.

After the project was marketed in the Bergen press, shipowners Fredrik Georg Gade and Johan A. Mowinckel supported it, as did major Wollert Konow (SB).

[7] The concession was granted on 2 February 1891 and had a duration of 40 years from the date the line started operation.

In addition to the share sales, the railway received free real estate from many farmers.

This combination made it possible to avoid any tunnels whatsoever and the longest bridge was 8 metres.

The railway was of vast importance for the Os community, as it allowed for day trips to Bergen.

[citation needed] Despite a boom caused by World War I, the railway lost business to road transport, which provided faster service.

The remaining section past Kalandseid has been regulated, but lack of funding has delayed the process.

Plans exist to renovate and revert it to its look from 1894, but lack of money has only resulted in the station being painted in the original colors.

Os Cultural Development has the rights to use the municipally owned building, and they have stated that they plan to convert it to a center for art.

[10] Two passenger cars are displayed at the Norwegian Railway Museum in Hamar, after they had served on the Urskog–Høland Line from 1935 to 1960.