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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| China | 58,656.0 | 62,200.0 | 66,239.0 | 72,487.0 | 85,843.0 | 79,306.0 | 85,320.0 | 89,966.0 | 91,675.0 | 93,742.0 | 96,353.0 | 1,02,462.0 | 1,06,235.0 | 1,09,767.0 |
| Kazakhstan | 13,545.0 | 14,204.0 | 14,184.1 | 14,319.4 | 14,758.9 | 14,767.1 | 14,767.1 | 14,767.1 | 15,529.0 | 16,040.3 | 16,060.8 | 16,060.8 | 16,063.0 | 16,005.6 |
| Kyrgyzstan | 417.0 | 417.0 | 417.2 | 417.2 | 417.2 | 417.0 | 424.0 | 424.0 | 424.0 | 424.0 | 424.0 | 424.0 | 424.0 | 417.0 |
| Russian Federation | 86,075.0 | 85,542.0 | 85,292.0 | 85,166.0 | 85,248.0 | 85,266.0 | 84,581.0 | 85,262.0 | 85,375.0 | 85,545.0 | 85,626.0 | 85,494.0 | 85,555.0 | 85,544.0 |
| Tajikistan | 533.0 | 617.0 | 620.7 | 620.7 | 608.0 | 587.0 | 597.0 | 597.0 | 620.0 | 620.0 | 620.0 | 620.0 | 662.0 | 620.0 |
| Pakistan | 7,791.0 | 7,791.0 | 7,791.0 | 7,791.0 | 7,791.0 | 7,791.0 | 7,784.0 | 7,791.0 | 7,791.0 | 7,791.0 | 7,791.0 | 7,791.0 |