universal adult

Saint Helena
NA years of age

Saint Kitts and Nevis
18 years of age; universal

Saint Lucia
18 years of age; universal

Saint Pierre and Miquelon
18 years of age; universal

Saint Vincent and the Grenadines
18 years of age; universal

Samoa
21 years of age; universal

San Marino
18 years of age; universal

Sao Tome and Principe
18 years of age; universal

Saudi Arabia
adult male citizens age 21 or older
note: voter registration began in November 2004 for partial
municipal council elections held nationwide from February through
April 2005

Senegal
18 years of age; universal

Serbia
18 universal

Seychelles
17 years of age; universal

Sierra Leone
18 years of age; universal

Singapore
21 years of age; universal and compulsory

Slovakia
18 years of age; universal

Slovenia
18 years of age; universal (16 years of age, if employed)

Solomon Islands
21 years of age; universal

Somalia
18 years of age; universal

South Africa
18 years of age; universal

Spain
18 years of age; universal

Sri Lanka
18 years of age; universal

Sudan
17 years of age; universal, but noncompulsory

Suriname
18 years of age; universal

Swaziland
18 years of age

Sweden
18 years of age; universal

Switzerland
18 years of age; universal

Syria
18 years of age; universal

Taiwan
20 years of age; universal

Tajikistan
18 years of age; universal

Tanzania
18 years of age; universal

Thailand
18 years of age; universal and compulsory

Togo
NA years of age; universal adult

Tokelau
21 years of age; universal

Tonga
21 years of age; universal

Trinidad and Tobago
18 years of age; universal

Tunisia
20 years of age; universal except for active duty military

Turkey
18 years of age; universal

Turkmenistan
18 years of age; universal

Turks and Caicos Islands
18 years of age; universal

Tuvalu
18 years of age; universal

Uganda
18 years of age; universal

Ukraine
18 years of age; universal

United Arab Emirates
none

United Kingdom
18 years of age; universal

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 o