Rail lines are the length of railway route available for train service, irrespective of the number of parallel tracks.
| 2000 | 2005 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cambodia | 601 | |||||||||||||
| China | 58,656 | 62,200 | 66,239 | 72,487 | 85,843 | 79,306 | 85,320 | 89,966 | 91,675 | 93,742 | 96,353 | 1,02,462 | 1,06,235 | 1,09,767 |
| Indonesia | 4,684 | 4,828 | 4,861 | 5,107 | 5,196 | 5,357 | 5,384 | 4,749 | 5,483 | 5,483 | ||||
| Japan | 20,140 | 20,087 | ||||||||||||
| Republic of Korea | 3,123 | 3,392 | 3,618 | 3,637 | 3,650 | 3,666 | 3,668 | 3,944 | 4,071 | 4,071 | 4,200 | 4,109 | 4,285 | 4,309 |
| Malaysia | 1,636 | 1,667 | 2,210 | 2,250 | 2,773 | 1,655 | 1,655 | 1,655 | 1,655 | |||||
| Philippines | 509 | 509 | ||||||||||||
| Thailand | 4,044 | 4,458 | 4,458 | 3,742 | 3,742 | 4,092 | ||||||||
| Viet Nam | 3,142 | 3,147 | 2,577 | 2,347 | 2,347 | 2,347 | 3,186 | 3,186 | 2,581 | 2,367 | 2,382 | 2,481 | 3,159 | 3,159 |