| Rank | Country | dual gauge | Railways |
| Haiti | | void |
| Heard Island and McDonald Islands | | void |
| Holy See (Vatican City) | | void |
| Honduras | | total: 75 km narrow gauge: 75 km 1.067-m gauge (2009) |
| Hong Kong | | void |
| Hungary | | total: 9,208 km broad gauge: 36 km 1.524-m gauge standard gauge: 7,802 km 1.435-m gauge (2,911 km electrified) narrow gauge: 219 km 0.760-m gauge (2009) |
| Iceland | | void |
| India | | total: 63,974 km broad gauge: 54,257 km 1.676-m gauge (18,927 km electrified) narrow gauge: 7,180 km 1.000-m gauge; 2,537 km 0.762-m gauge and 0.610-m gauge (2010) |
| Indian Ocean | | void |
| Indonesia | | total: 5,042 km narrow gauge: 5,042 km 1.067-m gauge (565 km electrified) (2009) |
| Iran | | total: 8,442 km broad gauge: 94 km 1.676-m gauge standard gauge: 8,348 km 1.435-m gauge (148 km electrified) (2008) |
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This page was last updated on 2 February, 2012 |
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