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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Albania | 440.0 | 423.0 | ||||||||||||
| Armenia | 843.0 | 826.1 | 703.2 | 703.2 | 679.4 | 685.7 | 698.4 | 698.4 | 698.4 | 698.4 | ||||
| Azerbaijan | 2,116.0 | 2,122.0 | 2,079.1 | 2,079.3 | 2,068.1 | 2,068.1 | 2,066.4 | 2,067.8 | 2,074.0 | 2,132.0 | 2,133.1 | 2,139.9 | 2,239.2 | 2,138.9 |
| Bulgaria | 4,320.0 | 4,154.0 | 4,097.0 | 4,072.0 | 4,070.0 | 4,032.0 | 4,023.0 | 4,019.0 | 4,029.0 | 4,030.0 | 4,030.0 | 4,030.0 | 4,029.0 | 4,031.0 |
| Georgia | 1,562.0 | 1,336.0 | 1,566.4 | 1,262.2 | 1,577.6 | 1,453.4 | 1,453.4 | 1,491.0 | 1,415.0 | 1,285.0 | 1,285.0 | 1,378.0 | 1,411.0 | 1,387.0 |
| Greece | 2,385.0 | 2,576.0 | 2,552.0 | 2,554.0 | 2,208.0 | 2,265.0 | 2,238.0 | 2,240.0 | 2,240.0 | 2,240.0 | 2,293.0 | 2,280.0 | 2,345.0 | 2,339.0 |
| Republic of Moldova | 1,139.0 | 1,075.0 | 1,156.9 | 1,156.9 | 1,156.9 | 1,156.9 | 1,156.0 | 1,151.0 | 1,151.0 | 1,151.0 | 1,151.0 | 1,151.0 | 1,151.0 | 1,149.0 |
| Romania | 11,364.0 | 10,781.0 | 10,777.0 | 10,777.0 | 10,777.0 | 10,768.0 | 10,770.0 | 10,770.0 | 10,766.0 | 10,766.0 | 10,765.0 | 10,759.0 | 10,769.0 | 10,769.0 |
| 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 |
| Serbia | 3,809.0 | 3,809.0 | 3,809.0 | 3,809.0 | 3,809.0 | 3,809.0 | 3,809.0 | 3,809.0 | 3,736.0 | 3,736.0 | 3,724.5 | 3,724.5 | 3,333.4 | 3,348.1 |
| Turkey | 8,671.0 | 8,697.0 | 9,594.0 | 9,642.0 | 9,642.0 | 9,718.0 | 10,087.0 | 10,131.0 | 10,131.0 | 10,207.0 | 10,315.0 | 10,378.0 | 10,378.0 | 10,546.0 |
| Ukraine | 22,302.0 | 22,001.0 | 21,705.0 | 21,665.4 | 21,642.5 | 21,625.9 | 21,625.9 | 20,975.2 | 21,603.0 | 21,625.9 | 21,625.9 | 21,625.9 | 21,625.9 |