| Rank | Country | | Suffrage |
185 | Suriname | 18 | 18 years of age; universal |
186 | Swaziland | 18 | 18 years of age |
187 | Sweden | 18 | 18 years of age; universal |
188 | Switzerland | 18 | 18 years of age; universal |
189 | Syria | 18 | 18 years of age; universal |
190 | Tajikistan | 18 | 18 years of age; universal |
191 | Tanzania | 18 | 18 years of age; universal |
192 | Thailand | 18 | 18 years of age; universal and compulsory |
193 | Trinidad and Tobago | 18 | 18 years of age; universal |
194 | Tunisia | 18 | 18 years of age; universal except for active government security forces (including the police and the military), people with mental disabilities, people who have served more than three months in prison (criminal cases only), and people given a suspended sentence of more than six months |
195 | Turkey | 18 | 18 years of age; universal |
196 | Turkmenistan | 18 | 18 years of age; universal |
197 | Turks and Caicos Islands | 18 | 18 years of age; universal |
198 | Tuvalu | 18 | 18 years of age; universal |
199 | Uganda | 18 | 18 years of age; universal |
200 | Ukraine | 18 | 18 years of age; universal |
201 | United Kingdom | 18 | 18 years of age; universal |
202 | United States | 18 | 18 years of age; universal |
203 | Uruguay | 18 | 18 years of age; universal and compulsory |
204 | Uzbekistan | 18 | 18 years of age; universal |
205 | Vanuatu | 18 | 18 years of age; universal |
206 | Venezuela | 18 | 18 years of age; universal |
207 | Vietnam | 18 | 18 years of age; universal |
208 | Virgin Islands | 18 | 18 years of age; universal; island residents are US citizens but do not vote in US presidential elections |
209 | Wallis and Futuna | 18 | 18 years of age; universal |
210 | Yemen | 18 | 18 years of age; universal |
211 | Zambia | 18 | 18 years of age; universal |
212 | Zimbabwe | 18 | 18 years of age; universal |
213 | Indonesia | 17 | 17 years of age; universal and married persons regardless of age |
214 | Korea, North | 17 | 17 years of age; universal |
215 | Seychelles | 17 | 17 years of age; universal |
216 | Sudan | 17 | 17 years of age; universal |
217 | Timor-Leste | 17 | 17 years of age; universal |
218 | Austria | 16 | 16 years of age; universal; note - reduced from 18 years of age in 2007 |
219 | Cuba | 16 | 16 years of age; universal |
220 | Iran | 16 | 16 years of age; universal |
221 | Isle of Man | 16 | 16 years of age; universal |