Under-five mortality rate is the probability per 1,000 that a newborn baby will die before reaching age five, if subject to current age-specific mortality rates.
| 1970 | 1990 | 2000 | 2005 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Czechia | 24.3 | 12.1 | 5.5 | 4.4 | 3.4 | 3.3 | 3.2 | 3.1 | 3.1 | 3.2 | 3.2 | 3.2 | 3.1 | 3.0 | 2.9 | 2.8 | 2.7 | 2.6 |
| Hungary | 38.9 | 17.2 | 10.1 | 7.5 | 6.0 | 5.9 | 5.7 | 5.6 | 5.3 | 5.1 | 4.7 | 4.5 | 4.3 | 4.1 | 4.0 | 4.0 | 3.9 | 3.8 |
| Poland | 35.9 | 17.4 | 9.3 | 7.6 | 6.0 | 5.7 | 5.4 | 5.2 | 5.0 | 4.9 | 4.8 | 4.6 | 4.5 | 4.4 | 4.4 | 4.4 | 4.4 | 4.4 |
| Slovak Republic | 29.5 | 14.7 | 9.6 | 8.3 | 6.9 | 6.7 | 6.6 | 6.4 | 6.3 | 6.2 | 6.1 | 6.0 | 6.0 | 5.9 | 5.9 | 6.0 | 6.0 | 6.1 |