| Rank | Country | Median age |
203 | Afghanistan | 
total: 17.6 years
male: 17.6 years
female: 17.6 years (2008 est.) |
| Akrotiri | void |
89 | Albania |
total: 29.5 years
male: 28.9 years
female: 30.2 years (2008 est.) |
117 | Algeria |
total: 26 years
male: 25.8 years
female: 26.2 years (2008 est.) |
134 | American Samoa |
total: 24 years
male: 23.9 years
female: 24.2 years (2008 est.) |
6 | Andorra |
total: 42.1 years
male: 42.3 years
female: 41.9 years (2008 est.) |
196 | Angola |
total: 18 years
male: 18 years
female: 18 years (2008 est.) |
74 | Anguilla |
total: 32.3 years
male: 31.3 years
female: 33.4 years (2008 est.) |
| Antarctica | void |
82 | Antigua and Barbuda |
total: 30.5 years
male: 30 years
female: 31.1 years (2008 est.) |
| Arctic Ocean | void |
84 | Argentina |
total: 30.3 years
male: 29.3 years
female: 31.3 years (2008 est.) |
80 | Armenia |
total: 31.1 years
male: 28.4 years
female: 34 years (2008 est.) |
46 | Aruba |
total: 37.6 years
male: 35.8 years
female: 39.3 years (2008 est.) |
| Ashmore and Cartier Islands | void |
| Atlantic Ocean | void |
49 | Australia |
total: 37.4 years
male: 36.6 years
female: 38.3 years (2008 est.) |
9 | Austria |
total: 41.7 years
male: 40.7 years
female: 42.8 years (2008 est.) |
105 | Azerbaijan |
total: 27.9 years
male: 26.3 years
female: 29.7 years (2008 est.) |
100 | Bahamas, The |
total: 28.4 years
male: 27.6 years
female: 29.2 years (2008 est.) |
86 | Bahrain |
total: 29.9 years
male: 33 years
female: 26.4 years (2008 est.) |
142 | Bangladesh |
total: 22.8 years
male: 22.8 years
female: 22.9 years (2008 est.) |
61 | Barbados |
total: 35.4 years
male: 34.2 years
female: 36.4 years (2008 est.) |
40 | Belarus |
total: 38.4 years
male: 35.4 years
female: 41.3 years (2008 est.) |
12 | Belgium |
total: 41.4 years
male: 40.2 years
female: 42.7 years (2008 est.) |
170 | Belize |
total: 20.1 years
male: 20 years
female: 20.3 years (2008 est.) |
198 | Benin |
total: 17.9 years
male: 17.5 years
female: 18.3 years (2008 est.) |
17 | Bermuda |
total: 41 years
male: 40.1 years
female: 41.8 years (2008 est.) |
138 | Bhutan |
total: 23.5 years
male: 24.1 years
female: 22.8 years (2008 est.) |
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