Red list index (Our World) in Tonga
Tonga: Red list index (Our World) was 0.75 in 2025. ▼ Falling
Latest (2025)
0.75
Change on year
unchanged
World rank
200th
of 247 countries
All-time high
0.82
in 1983
All-time low
0.75
in 2024
Years of data
46
1980–2025
Red list index in Tonga, 1980–2025
Source: Our World in Data.
Analysis
In 2025, red list index in Tonga stood at 0.75. That is the lowest value across all 46 years on record.
The figure is down 5.1% over ten years.
Over the whole period, red list index in Tonga peaked at 0.82 in 1983 and was at its lowest, 0.75, in 2024.
Tonga ranks 200th of 247 countries on this measure, in the bottom quarter.
The long-run direction has been consistently falling across the 46 years of available data.
Red list index (Our World) in Tonga, year by year
| Year | Value | Change |
|---|---|---|
| 1980 | 0.81 | — |
| 1981 | 0.81 | +0.0% |
| 1982 | 0.81 | +0.0% |
| 1983 | 0.82 | +1.2% |
| 1984 | 0.82 | +0.0% |
| 1985 | 0.82 | +0.0% |
| 1986 | 0.82 | +0.0% |
| 1987 | 0.82 | +0.0% |
| 1988 | 0.82 | +0.0% |
| 1989 | 0.82 | +0.0% |
| 1990 | 0.82 | +0.0% |
| 1991 | 0.82 | +0.0% |
| 1992 | 0.82 | +0.0% |
| 1993 | 0.82 | +0.0% |
| 1994 | 0.82 | +0.0% |
| 1995 | 0.82 | +0.0% |
| 1996 | 0.82 | +0.0% |
| 1997 | 0.82 | +0.0% |
| 1998 | 0.82 | +0.0% |
| 1999 | 0.81 | -1.2% |
| 2000 | 0.81 | +0.0% |
| 2001 | 0.81 | +0.0% |
| 2002 | 0.81 | +0.0% |
| 2003 | 0.82 | +1.2% |
| 2004 | 0.81 | -1.2% |
| 2005 | 0.81 | +0.0% |
| 2006 | 0.81 | +0.0% |
| 2007 | 0.81 | +0.0% |
| 2008 | 0.81 | +0.0% |
| 2009 | 0.81 | +0.0% |
| 2010 | 0.8 | -1.2% |
| 2011 | 0.8 | +0.0% |
| 2012 | 0.8 | +0.0% |
| 2013 | 0.79 | -1.3% |
| 2014 | 0.79 | +0.0% |
| 2015 | 0.79 | +0.0% |
| 2016 | 0.78 | -1.3% |
| 2017 | 0.78 | +0.0% |
| 2018 | 0.77 | -1.3% |
| 2019 | 0.77 | +0.0% |
| 2020 | 0.77 | +0.0% |
| 2021 | 0.76 | -1.3% |
| 2022 | 0.76 | +0.0% |
| 2023 | 0.76 | +0.0% |
| 2024 | 0.75 | -1.3% |
| 2025 | 0.75 | +0.0% |
Tonga compared with similar countries
- Tonga's 0.75 is below the median for upper middle income countries, which is 0.825, 91% of the median. (58 countries reporting)
- Tonga's 0.75 is below the median for East Asia & Pacific, which is 0.81, 93% of the median. (37 countries reporting)
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | 0.817 | 0.81 | 0.82 | 10 |
| 1990s | 0.819 | 0.81 | 0.82 | 10 |
| 2000s | 0.811 | 0.81 | 0.82 | 10 |
| 2010s | 0.787 | 0.77 | 0.8 | 10 |
| 2020s | 0.7583 | 0.75 | 0.77 | 6 |
Countries ranked near Tonga
More reference data data for Tonga
- Emission Totals - Indirect emissions (N2O) - Manure applied to Soils 0.0105 (2050)
- Emission Totals - Indirect emissions (N2O) - Manure left on Pasture 0.0092 (2050)
- Emission Totals - Indirect emissions (N2O) - IPCC Agriculture 0.0197 (2050)
- Emission Totals - Indirect emissions (N2O) - Agricultural Soils 0.0197 (2050)
- Emission Totals - Emissions (N2O) - Manure applied to Soils 0.0353 (2050)
- Emission Totals - Emissions (N2O) - Manure Management 0.0269 (2050)
- Emission Totals - Emissions (N2O) - Manure left on Pasture 0.0446 (2050)
- Emission Totals - Emissions (N2O) - IPCC Agriculture 0.1068 (2050)
- Emission Totals - Emissions (N2O) - Agricultural Soils 0.0799 (2050)
- Emission Totals - Emissions (CO2eq) from N2O (AR5) - Manure applied 9.35 (2050)
Frequently asked questions
- What is red list index in Tonga?
- Red list index in Tonga was 0.75 in 2025, according to Our World in Data.
- What is the highest red list index recorded in Tonga?
- The highest recorded value was 0.82 in 1983.
- What is the lowest red list index recorded in Tonga?
- The lowest recorded value was 0.75 in 2024.
- How does Tonga rank for red list index?
- Tonga ranks 200th out of 247 countries with data for 2025.
- Is red list index rising or falling in Tonga?
- Over the last ten years it is down 5.1%. The long-run trend across the full record is falling.
- Where does this Tonga data come from?
- The figures come from Our World in Data, published as part of Red list index. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 46 observations, free to reuse under CC BY 4.0 (Our World in Data).