Inequality-adjusted Human Development Index in Tonga
Tonga: Inequality-adjusted Human Development Index was 0.682 in 2023. ▬ Flat
Inequality-adjusted Human Development Index in Tonga, 2019–2023
Source: UNDP, Human Development Report (2025) – with minor processing by Our World in Data.
Analysis
The most recent figure for inequality-adjusted human development index in Tonga is 0.682, measured in 2023. That is the highest value across all 5 years on record.
Compared with earlier readings it is up 0.7% on the previous year and up 1.0% over five years.
Tonga ranks 64th of 166 countries on this measure, in the middle of the range.
Inequality-adjusted Human Development Index in Tonga, year by year
| Year | Value | Change |
|---|---|---|
| 2019 | 0.675 | — |
| 2020 | 0.678 | +0.4% |
| 2021 | 0.676 | -0.3% |
| 2022 | 0.677 | +0.1% |
| 2023 | 0.682 | +0.7% |
Tonga compared with similar countries
- Tonga's 0.682 is above the median for upper middle income countries, which is 0.6405, 1.1× the median. (46 countries reporting)
- Tonga's 0.682 is above the median for East Asia & Pacific, which is 0.6285, 1.1× the median. (26 countries reporting)
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 2010s | 0.675 | 0.675 | 0.675 | 1 |
| 2020s | 0.6783 | 0.676 | 0.682 | 4 |
Countries ranked near Tonga
More poverty & inequality data for Tonga
- Number of income/consumption surveys in the past decade available via the World Bank 1 surveys (2025)
- Number of income/consumption surveys in the past decade available via 0 surveys per person (2025)
- Number of income/consumption surveys in the past decade available via 0 surveys per US$ of GDP (2025)
- Fertility rate vs. share living in extreme poverty 3.13 live births per woman (2023)
- Tax revenues vs income inequality, gaps filled 22.19 (2023)
- Tax revenue as share of GDP vs. income inequality 22.2% (2023)
- Tax revenues vs income inequality, per unit of GDP 0 units per US$ of GDP (2023)
- Tax revenues vs income inequality, annual growth rate -4.08 % change on previous year (2023)
- Number of income/consumption surveys in the past decade available via -50 % change on previous year (2025)
- Gender Inequality Index 0.444 (2023)
Frequently asked questions
- What is inequality-adjusted human development index in Tonga?
- Inequality-adjusted human development index in Tonga was 0.682 in 2023, according to UNDP, Human Development Report (2025) – with minor processing by Our World in Data.
- What is the highest inequality-adjusted human development index recorded in Tonga?
- The highest recorded value was 0.682 in 2023.
- What is the lowest inequality-adjusted human development index recorded in Tonga?
- The lowest recorded value was 0.675 in 2019.
- How does Tonga rank for inequality-adjusted human development index?
- Tonga ranks 64th out of 166 countries with data for 2023.
- Where does this Tonga data come from?
- The figures come from UNDP, Human Development Report (2025) – with minor processing by Our World in Data, published as part of Inequality-adjusted Human Development Index. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 5 observations, free to reuse under CC BY 4.0 (Our World in Data).
About this data
The Inequality-adjusted Human Development Index (IHDI) is a summary measure of key dimensions of human development: a long and healthy life, a good education, and a decent standard of living, adjusted for inequalities in these dimensions. Higher values indicate higher and more equal human development.