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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Armenia | 843.0 | 826.1 | 703.2 | 703.2 | 679.4 | 685.7 | 698.4 | 698.4 | 698.4 | 698.4 | ||||
| Belarus | 5,512.0 | 5,498.0 | 5,482.0 | 5,482.0 | 5,462.0 | 5,469.0 | 5,470.0 | 5,470.0 | 5,459.0 | 5,459.0 | 5,459.0 | 5,459.2 | 5,453.5 | 5,474.0 |
| 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 |