| Rank | Country | Median age |
211 | Gaza Strip | total: 17.7 years male: 17.5 years female: 17.9 years (2011 est.) |
44 | Georgia | total: 39.1 years male: 36.6 years female: 41.6 years (2011 est.) |
2 | Germany | total: 44.9 years male: 43.7 years female: 46 years (2011 est.) |
173 | Ghana | total: 21.4 years male: 21.1 years female: 21.6 years (2011 est.) |
74 | Gibraltar | total: 33.3 years male: 32.4 years female: 34.3 years (2011 est.) |
10 | Greece | total: 42.5 years male: 41.4 years female: 43.6 years (2011 est.) |
71 | Greenland | total: 33.6 years male: 35 years female: 32.1 years (2011 est.) |
111 | Grenada | total: 28.6 years male: 28.6 years female: 28.6 years (2011 est.) |
105 | Guam | total: 29.4 years male: 29 years female: 29.8 years (2011 est.) |
184 | Guatemala | total: 20 years male: 19.4 years female: 20.7 years (2011 est.) |
14 | Guernsey | total: 42.2 years male: 41.1 years female: 43.2 years (2011 est.) |
200 | Guinea | total: 18.6 years male: 18.3 years female: 18.8 years (2011 est.) |
186 | Guinea-Bissau | total: 19.5 years male: 18.9 years female: 20 years (2011 est.) |
150 | Guyana | total: 23.9 years male: 23.2 years female: 24.6 years (2011 est.) |
174 | Haiti | total: 21.4 years male: 21.1 years female: 21.6 years (2011 est.) |
| Heard Island and McDonald Islands | void |
| Holy See (Vatican City) | void |