| Rank | Country | dual gauge | Railways |
| Iraq | | total: 2,272 km standard gauge: 2,272 km 1.435-m gauge (2008) |
| Ireland | | total: 3,237 km broad gauge: 1,872 km 1.600-m gauge (37 km electrified) narrow gauge: 1,365 km 0.914-m gauge (operated by the Irish Peat Board to transport peat to power stations and briquetting plants) (2008) |
| Isle of Man | | total: 63 km narrow gauge: 6 km 1.076-m gauge (6 km electrified); 57 km 0.914-m gauge (29 km electrified) note: primarily summer tourist attractions (2008) |
| Israel | | total: 975 km standard gauge: 975 km 1.435-m gauge (2010) |
| Italy | | total: 20,254 km standard gauge: 18,611 km 1.435-m gauge (12,662 km electrified) narrow gauge: 123 km 1.000-m gauge (123 km electrified); 1,290 km 0.950-m gauge (151 km electrified); 231 km 0.850-m gauge (2010) |
| Jamaica | | void |
| Jan Mayen | | void |
| Japan | | total: 26,435 km standard gauge: 3,978 km 1.435-m gauge (3,978 km electrified) narrow gauge: 96 km 1.372-m gauge (96 km electrified); 22,313 km 1.067-m gauge (15,235 km electrified); 48 km 0.762-m gauge (48 km electrified) (2009) |
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This page was last updated on 2 February, 2012 |
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