| Rank | Country | Median age |
97 | United Arab Emirates | total: 30.2 years
male: 32.1 years
female: 24.9 years (2011 est.) |
40 | United Kingdom | total: 40 years
male: 38.8 years
female: 41.1 years (2011 est.) |
61 | United States | total: 36.9 years
male: 35.6 years
female: 38.2 years (2011 est.) |
| United States Pacific Island Wildlife Refuges | void |
72 | Uruguay | total: 33.6 years
male: 32 years
female: 35.2 years (2011 est.) |
135 | Uzbekistan | total: 25.7 years
male: 25.2 years
female: 26.3 years (2011 est.) |
141 | Vanuatu | total: 24.9 years
male: 24.9 years
female: 25 years (2011 est.) |
133 | Venezuela | total: 26.1 years
male: 25.4 years
female: 26.8 years (2011 est.) |
118 | Vietnam | total: 27.8 years
male: 26.8 years
female: 28.9 years (2011 est.) |
32 | Virgin Islands | total: 40.4 years
male: 39.9 years
female: 40.8 years (2011 est.) |
| Wake Island | void |
114 | Wallis and Futuna | total: 28.5 years
male: 27.5 years
female: 29.7 years (2011 est.) |
176 | West Bank | total: 21.3 years
male: 21.1 years
female: 21.5 years (2011 est.) |
183 | Western Sahara | total: 20.3 years
male: 19.8 years
female: 20.8 years (2011 est.) |
| World | total: 28.4 years
male: 27.7 years
female: 29 years (2009 est.) |
208 | Yemen | total: 18.1 years
male: 18 years
female: 18.2 years (2011 est.) |
223 | Zambia | total: 16.5 years
male: 16.5 years
female: 16.6 years (2011 est.) |
204 | Zimbabwe | total: 18.3 years
male: 17.4 years
female: 19.2 years (2011 est.) |
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