Vietnam Railways is the state-owned operator of the railway system in Vietnam. The principal route is the 1,727 km (1,100 mi) single-track North–South Railway line, running between Hanoi and Ho Chi Minh City. This was built at the metre gauge in the 1880s during the French colonial rule. There are also standard gauge lines running from Hanoi to the People’s Republic of China, eventually leading to Beijing, and some mixed gauge in and around Hanoi.

The North–South railway is the principal railway line serving the country of Vietnam. It is a single-track metre gauge line connecting the capital Hanoi in the north to Ho Chi Minh City in the south, for a total length of 1,726 km (1,072 mi). Trains travelling this line are sometimes referred to as the Reunification Express, although no particular train carries this name officially. The line was established during French colonial rule, and was completed over a period of nearly forty years, from 1899 to 1936. As of 2005, 191 of Vietnam's 278 railway stations were located along the North–South line.