Thanaleng station, also known as Dongphosy station, is a railway station in Dongphosy village, Hadxayfong district, Vientiane Prefecture, Laos. It is 20 km (12 mi) east of the Lao capital city of Vientiane and 4 km (2.5 mi) north of the Lao-Thai border on the Mekong River. The station opened on 5 March 2009, becoming part of the first international railway link serving Laos. Originally intended for use as a passenger station, Lao officials have stated their intention to convert it to a rail freight terminal to provide a low-cost alternative to road freight, the main mode of transport for goods entering Thailand. The station provides a connection between Vientiane and the capital cities of three other ASEAN nations: Thailand, Malaysia, and Singapore, and several major Southeast Asian ports.

Vientiane is the capital and largest city of Laos. Comprising the five urban districts of Vientiane Prefecture, the city is located on the banks of the Mekong, right at the border with Thailand. Vientiane was the administrative capital during French rule and, due to economic growth in recent times, is now the economic center of Laos. The city had a population of 1,001,477 as of the 2023 Census.