This article is a list of countries by median age[1] , the age that divides a population into two numerically equal groups; that is, half the people are younger than this age and half are older.
| Rank | Country / Territory | Total | Male | Female |
| 1 | Uruguay | 33.6 | 32.0 | 35.2 |
| 2 | Chile | 32.1 | 31.1 | 33.1 |
| 3 | Argentina | 30.5 | 29.5 | 31.6 |
| 4 | French Guiana | 29.3 | 30.4 | 28.2 |
| 5 | Brazil | 29.3 | 28.5 | 30.1 |
| 6 | Suriname | 28.7 | 28.3 | 29.1 |
| 7 | Colombia | 28.0 | 27.0 | 28.9 |
| 8 | Peru | 26.2 | 25.5 | 26.8 |
| 9 | Venezuela | 26.1 | 25.4 | 26.8 |
| 10 | Ecuador | 25.7 | 25.0 | 26.3 |
| 11 | Paraguay | 25.4 | 25.1 | 25.6 |
| 12 | Guyana | 23.9 | 23.2 | 24.6 |
| 13 | Bolivia | 22.5 | 21.8 | 23.2 |
| Total | 27.8 | 27.1 | 28.4 |