Number of one-year-olds who are not vaccinated against polio in Tonga
Tonga: Number of one-year-olds who are not vaccinated against polio was 23.98 one-year-olds in 2023. ◆ Volatile
Number of one-year-olds who are not vaccinated against polio in Tonga, 1980–2023
Source: WHO & UNICEF (2025); UN, World Population Prospects (2024) – processed by Our World in Data. Measured in one-year-olds.
Analysis
In 2023, number of one-year-olds who are not vaccinated against polio in Tonga stood at 23.98 one-year-olds.
The figure is up 0.6% on the previous year and down 13.8% over ten years.
Over the whole period, number of one-year-olds who are not vaccinated against polio in Tonga peaked at 2,454 one-year-olds in 1980 and was at its lowest, 23.6 one-year-olds, in 2021.
Tonga ranks 184th of 194 countries on this measure, in the bottom quarter.
The series is highly variable year to year, so single readings are best treated with caution.
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | 1,015 one-year-olds | 210.84 one-year-olds | 2,454 one-year-olds | 10 |
| 1990s | 146.33 one-year-olds | 28.44 one-year-olds | 284.1 one-year-olds | 10 |
| 2000s | 81.02 one-year-olds | 28.64 one-year-olds | 289 one-year-olds | 10 |
| 2010s | 57.69 one-year-olds | 24.33 one-year-olds | 145.1 one-year-olds | 10 |
| 2020s | 23.81 one-year-olds | 23.6 one-year-olds | 23.98 one-year-olds | 4 |
Countries ranked near Tonga
- 181 Maldives 59.3 one-year-olds compare
- 182 Seychelles 54.12 one-year-olds compare
- 183 Cook Islands 26.32 one-year-olds compare
- 185 Saint Kitts and Nevis 22.36 one-year-olds compare
- 186 Antigua and Barbuda 22.18 one-year-olds compare
- 187 San Marino 19.89 one-year-olds compare
More health data for Tonga
- Estimated changes in temperature-related death rates compared to projected death rates 834.5 deaths per 1,000 people (2090)
- Number of infants who die before age 1 2 deaths (2100)
- Deaths in armed conflicts based on where they occurred 0 deaths (2026)
- Deaths in armed conflicts by region 0 deaths (2026)
- Age population, age 25, male, interpolated 698 (2025)
- Age population, age 25, female, interpolated 842 (2025)
- Age population, age 24, male, interpolated 804 (2025)
- Age population, age 24, female, interpolated 908 (2025)
- Age population, age 23, male, interpolated 865 (2025)
- Age population, age 23, female, interpolated 951 (2025)
Frequently asked questions
- What is number of one-year-olds who are not vaccinated against polio in Tonga?
- Number of one-year-olds who are not vaccinated against polio in Tonga was 23.98 one-year-olds in 2023, according to WHO & UNICEF (2025); UN, World Population Prospects (2024) – processed by Our World in Data.
- What is the highest number of one-year-olds who are not vaccinated against polio recorded in Tonga?
- The highest recorded value was 2,454 one-year-olds in 1980.
- What is the lowest number of one-year-olds who are not vaccinated against polio recorded in Tonga?
- The lowest recorded value was 23.6 one-year-olds in 2021.
- How does Tonga rank for number of one-year-olds who are not vaccinated against polio?
- Tonga ranks 184th out of 194 countries with data for 2023.
- Is number of one-year-olds who are not vaccinated against polio rising or falling in Tonga?
- Over the last ten years it is down 13.8%. The long-run trend across the full record is volatile.
- Where does this Tonga data come from?
- The figures come from WHO & UNICEF (2025); UN, World Population Prospects (2024) – processed by Our World in Data, published as part of Number of one-year-olds who are not vaccinated against polio. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 44 observations, free to reuse under CC BY 4.0 (Our World in Data).
About this data
Number of one-year-olds who have not had the third dose of either the oral or inactivated polio vaccine in a given year.