United States
18 years of age; universal
Uruguay
18 years of age; universal and compulsory
Uzbekistan
18 years of age; universal
Vanuatu
18 years of age; universal
Venezuela
18 years of age; universal
Vietnam
18 years of age; universal
Virgin Islands
18 years of age; universal; island residents are US
citizens but do not vote in US presidential elections
Wallis and Futuna
18 years of age; universal
Western Sahara
none; a UN-sponsored voter identification campaign
not yet completed
Yemen
18 years of age; universal