| Rank | Country | Waterways |
| Tanzania | Lake Tanganyika, Lake Victoria, and Lake Nyasa principal avenues of commerce with neighboring countries; rivers not navigable (2005) |
27 | Thailand | 4,000 km note: 3,701 km navigable by boats with drafts up to 0.9 m (2005) |
| Timor-Leste | void |
103 | Togo | 50 km (seasonally on Mono River depending on rainfall) (2005) |
| Tokelau | void |
| Tonga | void |
| Trinidad and Tobago | void |
| Tunisia | void |
60 | Turkey | 1,200 km (2005) |
56 | Turkmenistan | 1,300 km (Amu Darya and Kara Kum canal important inland waterways) (2006) |
| Turks and Caicos Islands | void |
| Tuvalu | void |
98 | Uganda | on Lake Victoria, 200 km on Lake Albert, Lake Kyoga, and parts of Albert Nile (2005) |
38 | Ukraine | 2,253 km (most on Dnieper River) (2006) |
| United Arab Emirates | void |
31 | United Kingdom | 3,200 km (620 km used for commerce) (2003) |
4 | United States | 41,009 km (19,312 km used for commerce) note: Saint Lawrence Seaway of 3,769 km, including the Saint Lawrence River of 3,058 km, shared with Canada (2007) |
| United States Pacific Island Wildlife Refuges | void |
51 | Uruguay | 1,600 km (2005) |
62 | Uzbekistan | 1,100 km (2006) |
| Vanuatu | void |
21 | Venezuela | 7,100 km note: Orinoco River (400 km) and Lake de Maracaibo navigable by oceangoing vessels (2005) |
7 | Vietnam | 17,702 km (5,000 km navigable by vessels up to 1.8 m draft) (2005) |
| Virgin Islands | void |
| Wake Island | void |
| Wallis and Futuna | void |
| West Bank | void |
| Western Sahara | void |
| World | 671,886 km (2004) |
| Yemen | void |
40 | Zambia | 2,250 km (includes Lake Tanganyika and the Zambezi and Luapula rivers) (2005) |
| Zimbabwe | on Lake Kariba (2005) |
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This page was last updated on 1 June, 2008 |
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