Tren Patagónico (in English: "Patagonian Train") is a state-owned company of Río Negro Province in Argentina which operates an 827-km length 826-kilometre long (513 mi) 5 ft 6 in (1,676 mm) broad gauge railway line between Viedma and San Carlos de Bariloche.

With the increase in popularity of the line with tourists, it was decided to improve the image of the company by using the name Tren Patagónico.

As part of a railway privatisation carried out during the presidency of Carlos Menem from 1991, a concession to operate the line was granted to the Provincial government and later transferred to "Servicios Ferroviarios Patagónicos" (SEFEPA) in September 1993.

[4] In January 2015, the Government of Río Negro announced that $ 2,5 million would be invested in the modernization of the line.

[5] The Government considers the train an important source of income for the Province, having reached 100% of occupation during the 2015 Summer season.