乳児死亡率は、ある年の出生1000人当たりの、生後1年に到達する前に死んだ乳児の数です。
| 1970 | 1990 | 2000 | 2005 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| アルゼンチン | 59.3 | 24.8 | 16.7 | 14.4 | 12.4 | 11.9 | 11.4 | 10.9 | 10.4 | 10.0 | 9.7 | 9.4 | 9.2 | 8.9 | 8.7 | 8.5 | 8.3 | 8.2 |
| ボリビア | 155.7 | 90.0 | 59.6 | 45.7 | 34.9 | 33.2 | 31.5 | 29.9 | 28.4 | 27.1 | 25.9 | 24.8 | 23.9 | 23.0 | 22.2 | 21.4 | 20.7 | 20.0 |
| ブラジル | 102.0 | 52.0 | 29.1 | 21.0 | 16.0 | 15.3 | 14.8 | 14.4 | 14.0 | 13.7 | 14.6 | 13.3 | 13.1 | 13.0 | 12.8 | 12.7 | 12.6 | 12.5 |
| チリ | 68.0 | 16.0 | 9.2 | 7.7 | 7.5 | 7.4 | 7.2 | 7.1 | 7.0 | 6.8 | 6.7 | 6.5 | 6.3 | 6.0 | 5.9 | 5.8 | 5.9 | 6.2 |
| コロンビア | 72.8 | 29.6 | 21.6 | 18.8 | 16.3 | 15.8 | 15.3 | 14.8 | 14.4 | 14.0 | 13.6 | 13.2 | 12.7 | 12.4 | 12.0 | 11.6 | 11.3 | 10.9 |
| キューバ | 31.7 | 10.8 | 6.8 | 5.6 | 4.9 | 4.8 | 4.8 | 4.7 | 4.8 | 4.8 | 4.9 | 5.0 | 5.2 | 5.4 | 5.7 | 6.0 | 6.3 | 6.6 |
| エクアドル | 102.6 | 42.6 | 24.1 | 19.5 | 16.0 | 15.3 | 14.6 | 14.0 | 13.4 | 12.9 | 12.5 | 12.2 | 11.9 | 11.7 | 11.5 | 11.3 | 11.2 | 11.1 |
| メキシコ | 81.4 | 37.8 | 23.7 | 19.2 | 16.2 | 15.7 | 15.2 | 14.8 | 14.3 | 13.9 | 13.5 | 13.0 | 12.6 | 12.2 | 11.8 | 11.5 | 11.1 | 10.8 |
| パナマ | 50.7 | 23.9 | 20.3 | 17.2 | 14.7 | 14.3 | 14.1 | 13.9 | 13.7 | 13.6 | 13.5 | 13.4 | 13.1 | 12.7 | 12.2 | 11.6 | 11.1 | 10.6 |
| パラグアイ | 61.1 | 37.7 | 28.7 | 25.8 | 22.7 | 22.0 | 21.4 | 20.8 | 20.2 | 19.5 | 18.9 | 18.3 | 17.7 | 17.2 | 16.7 | 16.2 | 15.6 | 15.1 |
| ペルー | 125.0 | 59.7 | 29.9 | 21.4 | 16.8 | 16.2 | 15.7 | 15.3 | 15.0 | 14.7 | 14.5 | 14.4 | 14.3 | 14.2 | 14.1 | 14.0 | 13.8 | 13.5 |
| ウルグアイ | 48.7 | 20.8 | 14.7 | 12.4 | 9.2 | 8.8 | 8.5 | 8.2 | 7.9 | 7.5 | 7.2 | 6.8 | 6.5 | 6.2 | 6.0 | 5.8 | 5.6 | 5.5 |
| ベネズエラ（ボリバル共和国） | 49.5 | 24.3 | 17.5 | 15.3 | 14.5 | 14.8 | 15.1 | 15.4 | 15.8 | 16.8 | 21.5 | 21.5 | 21.5 | 21.5 | 21.5 | 21.5 | 21.5 | 21.5 |