| Rank | Country | broad gauge | Railways |
| Congo, Democratic Republic of the | | total: 5,138 km narrow gauge: 3,987 km 1.067-m gauge (858 km electrified); 125 km 1.000-m gauge; 1,026 km 0.600-m gauge (2006) |
| Congo, Republic of the | | total: 894 km narrow gauge: 894 km 1.067-m gauge (2006) |
| Cook Islands | | void |
| Coral Sea Islands | | void |
| Costa Rica | | total: 278 km narrow gauge: 278 km 1.067-m gauge note: none of the railway network is in use (2007) |
| Cote d'Ivoire | | total: 660 km narrow gauge: 660 km 1.000 meter gauge note: an additional 622 km of this railroad extends into Burkina Faso (2006) |
| Croatia | | total: 2,726 km standard gauge: 2,726 km 1.435-m gauge (1,199 km electrified) (2006) |
| Cuba | | total: 4,226 km standard gauge: 4,226 km 1.435-m gauge (140 km electrified) note: an additional 7,742 km of track is used by sugar plantations; about 65% of this track is standard gauge; the rest is narrow gauge (2006) |
| Cyprus | | void |
| Czech Republic | | total: 9,597 km standard gauge: 9,597 km 1.435-m gauge (3,041 km electrified) (2006) |
| Denmark | | total: 2,644 km standard gauge: 2,644 km 1.435-m gauge (636 km electrified) (2007) |
| Dhekelia | | void |
| Djibouti | | total: 100 km (Djibouti segment of the Addis Ababa-Djibouti railway) narrow gauge: 100 km 1.000-m gauge note: railway under joint control of Djibouti and Ethiopia but remains largely inoperable (2006) |
| Dominica | | void |
| Dominican Republic | | total: 517 km standard gauge: 375 km 1.435-m gauge narrow gauge: 142 km 0.762-m gauge note: additional 1,226 km operated by sugar companies in 1.076 m, 0.889 m, and 0.762-m gauges (2006) |
| Ecuador | | total: 966 km narrow gauge: 966 km 1.067-m gauge (2006) |
| Egypt | | total: 5,063 km standard gauge: 5,063 km 1.435-m gauge (62 km electrified) (2006) |
| El Salvador | | total: 562 km narrow gauge: 562 km 0.914-m gauge note: railways not in operation since 2005 because of disuse and high costs that led to a lack of maintenance (2007) |
| Equatorial Guinea | | void |
| Eritrea | | total: 306 km narrow gauge: 306 km 0.950-m gauge (2006) |