| Rank | Country | Median age |
77 | British Virgin Islands | 
total: 32.3 years
male: 32.4 years
female: 32.2 years (2009 est.) |
113 | Brunei |
total: 27.8 years
male: 27.7 years
female: 27.8 years (2009 est.) |
15 | Bulgaria |
total: 41.4 years
male: 39.2 years
female: 43.6 years (2009 est.) |
217 | Burkina Faso |
total: 16.8 years
male: 16.6 years
female: 17 years (2009 est.) |
110 | Burma |
total: 28.2 years
male: 27.7 years
female: 28.8 years (2009 est.) |
221 | Burundi |
total: 16.7 years
male: 16.5 years
female: 17 years (2009 est.) |
153 | Cambodia |
total: 22.1 years
male: 21.4 years
female: 22.8 years (2009 est.) |
183 | Cameroon |
total: 19.2 years
male: 19 years
female: 19.3 years (2009 est.) |
24 | Canada |
total: 40.4 years
male: 39.3 years
female: 41.5 years (2009 est.) |
167 | Cape Verde |
total: 21.1 years
male: 20.4 years
female: 21.9 years (2009 est.) |
47 | Cayman Islands |
total: 38.1 years
male: 37.7 years
female: 38.6 years (2009 est.) |
189 | Central African Republic |
total: 18.8 years
male: 18.5 years
female: 19.1 years (2009 est.) |
222 | Chad |
total: 16.5 years
male: 15.3 years
female: 17.7 years (2009 est.) |
82 | Chile |
total: 31.4 years
male: 30.4 years
female: 32.4 years (2009 est.) |
70 | China |
total: 34.1 years
male: 33.5 years
female: 34.7 years (2009 est.) |
| Christmas Island | void |
| Clipperton Island | void |
| Cocos (Keeling) Islands | void |
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