| Rank | Country | Railways |
101 | Benin | total: 758 km narrow gauge: 758 km 1.000-m gauge (2006) |
| Bermuda | void |
| Bhutan | void |
49 | Bolivia | total: 3,504 km narrow gauge: 3,504 km 1.000-m gauge (2006) |
109 | Bosnia and Herzegovina | total: 608 km standard gauge: 608 km 1.435-m gauge (2006) |
93 | Botswana | total: 888 km narrow gauge: 888 km 1.067-m gauge (2006) |
| Bouvet Island | void |
10 | Brazil | total: 29,295 km broad gauge: 4,932 km 1.600-m gauge (939 km electrified) standard gauge: 194 km 1.440-m gauge narrow gauge: 23,773 km 1.000-m gauge (581 km electrified) dual gauge: 396 km 1.000 m and 1.600-m gauges (three rails) (78 km electrified) (2006) |
| British Indian Ocean Territory | void |
| British Virgin Islands | void |
| Brunei | void |
37 | Bulgaria | total: 4,294 km standard gauge: 4,049 km 1.435-m gauge (2,710 km electrified) narrow gauge: 245 km 0.760-m gauge (2006) |
108 | Burkina Faso | total: 622 km narrow gauge: 622 km 1.000-m gauge note: another 660 km of this railway extends into Cote D'Ivoire (2006) |
43 | Burma | total: 3,955 km narrow gauge: 3,955 km 1.000-m gauge (2006) |
| Burundi | void |
110 | Cambodia | total: 602 km narrow gauge: 602 km 1.000-m gauge (2006) |
86 | Cameroon | total: 987 km narrow gauge: 987 km 1.000-m gauge (2006) |
6 | Canada | total: 48,068 km standard gauge: 48,068 km 1.435-m gauge (2006) |
| Cape Verde | void |
| Cayman Islands | void |
| Central African Republic | void |
| Chad | void |
27 | Chile | total: 6,585 km broad gauge: 2,831 km 1.676-m gauge (1,317 km electrified) narrow gauge: 3,754 km 1.000-m gauge (2006) |
3 | China | total: 75,438 km standard gauge: 75,438 km 1.435-m gauge (20,151 km electrified) (2005) |
| Christmas Island | void |
| Clipperton Island | void |
| Cocos (Keeling) Islands | void |
52 | Colombia | total: 3,304 km standard gauge: 150 km 1.435-m gauge narrow gauge: 3,154 km 0.914-m gauge (2006) |
| Comoros | void |