| Rank | Country | standard gauge | Railways |
| Anguilla | | void |
| Antarctica | | void |
| Antigua and Barbuda | | void |
| Arctic Ocean | | void |
| Armenia | | total: 839 km broad gauge: 839 km 1.520-m gauge (828 km electrified) note: some lines are out of service (2006) |
| Aruba | | void |
| Ashmore and Cartier Islands | | void |
| Atlantic Ocean | | void |
| Azerbaijan | | total: 2,122 km broad gauge: 2,122 km 1.520-m gauge (1,278 km electrified) (2006) |
| Bahamas, The | | void |
| Bahrain | | void |
| Bangladesh | | total: 2,768 km broad gauge: 946 km 1.676-m gauge narrow gauge: 1,822 km 1.000-m gauge (2006) |
| Barbados | | void |
| Belize | | void |
| Benin | | total: 758 km narrow gauge: 758 km 1.000-m gauge (2006) |
| Bermuda | | void |
| Bhutan | | void |
| Bolivia | | total: 3,504 km narrow gauge: 3,504 km 1.000-m gauge (2006) |
| Botswana | | total: 888 km narrow gauge: 888 km 1.067-m gauge (2006) |
| Bouvet Island | | void |
| British Indian Ocean Territory | | void |
| British Virgin Islands | | void |
| Brunei | | void |
| 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) |
| Burma | | total: 3,955 km narrow gauge: 3,955 km 1.000-m gauge (2006) |
| Burundi | | void |
| Cambodia | | total: 602 km narrow gauge: 602 km 1.000-m gauge (2006) |
| Cameroon | | total: 987 km narrow gauge: 987 km 1.000-m gauge (2006) |