Ukraine
2,253 km (most on Dnieper River) (2006)
United Kingdom
3,200 km (620 km used for commerce) (2003)
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 (2004)
Uruguay
1,600 km (2005)
Uzbekistan
1,100 km (2006)
Venezuela
7,100 km
note: Orinoco River and Lake de Maracaibo navigable by oceangoing
vessels, Orinoco for 400 km (2005)
Vietnam
17,702 km (5,000 km navigable by vessels up to 1.8 m draft)
(2005)
World
671,886 km (2004)
Zambia
2,250 km (includes Lake Tanganyika and the Zambezi and
Luapula rivers) (2005)
Zimbabwe
on Lake Kariba, length small (2005)