| Rank | Country | Railways |
33 | Korea, North | total: 5,235 km standard gauge: 5,235 km 1.435-m gauge (3,500 km electrified) (2006) |
50 | Korea, South | total: 3,472 km standard gauge: 3,472 km 1.435-m gauge (1,342 km electrified) (2006) |
120 | Kosovo | total: 430 km (2005) |
| Kuwait | void |
118 | Kyrgyzstan | total: 470 km broad gauge: 470 km 1.520-m gauge (2006) |
| Laos | void |
68 | Latvia | total: 2,303 km broad gauge: 2,270 km 1.520-m gauge (257 km electrified) narrow gauge: 33 km 0.750-m gauge (2006) |
121 | Lebanon | total: 401 km standard gauge: 319 km 1.435 m narrow gauge: 82 km 1.050 m note: rail system became unusable because of damage done during fighting in the 1980s and in 2006 (2006) |
| Lesotho | void |
116 | Liberia | total: 490 km standard gauge: 345 km 1.435-m gauge narrow gauge: 145 km 1.067-m gauge note: sections of railway are inoperable because of damage suffered during the civil war (2008) |
| Libya | 0 km note: Libya has announced plans to build seven lines totaling 2,757 km of 1.435-m gauge track (2006) |
| Liechtenstein | 9 km 1.435-m gauge (electrified) note: belongs to the Austrian Railway System connecting Austria and Switzerland (2006) |
78 | Lithuania | total: 1,771 km broad gauge: 1,749 km 1.524-m gauge (122 km electrified) standard gauge: 22 km 1.435-m gauge (2006) |
126 | Luxembourg | total: 275 km standard gauge: 275 km 1.435-m gauge (243 km electrified) (2006) |
| Macau | void |
105 | Macedonia | total: 699 km standard gauge: 699 km 1.435-m gauge (223 km electrified) (2006) |
95 | Madagascar | total: 854 km narrow gauge: 854 km 1.000-m gauge (2006) |
100 | Malawi | total: 797 km narrow gauge: 797 km 1.067-m gauge (2006) |
76 | Malaysia | total: 1,890 km standard gauge: 57 km 1.435-m gauge (57 km electrified) narrow gauge: 1,833 km 1.000-m gauge (150 km electrified) (2006) |
| Maldives | void |
102 | Mali | total: 729 km narrow gauge: 729 km 1.000-m gauge (2006) |
| Malta | void |
| Marshall Islands | void |
| Mauritania | 717 km standard gauge: 717 km 1.435-m gauge (2006) |
| Mauritius | void |
| Mayotte | void |