Theoretical duration of secondary education in Tonga
Tonga: Theoretical duration of secondary education was 7 years in 2025. ▲ Rising
Latest (2025)
7 years
Change on year
unchanged
World rank
26th
of 215 countries
All-time high
7 years
in 1984
All-time low
6 years
in 1970
Years of data
56
1970–2025
Theoretical duration of secondary education in Tonga, 1970–2025
Source: UNESCO Institute for Statistics. Measured in years.
Analysis
Tonga recorded 7 years for theoretical duration of secondary education in 2025. That is the highest value across all 56 years on record.
That represents a change of unchanged over ten years.
Over the whole period, theoretical duration of secondary education in Tonga peaked at 7 years in 1984 and was at its lowest, 6 years, in 1970.
That places Tonga 26th out of 215 countries with data for 2025, putting it in the top quarter.
The long-run direction has been consistently rising across the 56 years of available data.
Theoretical duration of secondary education in Tonga, year by year
| Year | years | Change |
|---|---|---|
| 1970 | 6 years | — |
| 1971 | 6 years | +0.0% |
| 1972 | 6 years | +0.0% |
| 1973 | 6 years | +0.0% |
| 1974 | 6 years | +0.0% |
| 1975 | 6 years | +0.0% |
| 1976 | 6 years | +0.0% |
| 1977 | 6 years | +0.0% |
| 1978 | 6 years | +0.0% |
| 1979 | 6 years | +0.0% |
| 1980 | 6 years | +0.0% |
| 1981 | 6 years | +0.0% |
| 1982 | 6 years | +0.0% |
| 1983 | 6 years | +0.0% |
| 1984 | 7 years | +16.7% |
| 1985 | 7 years | +0.0% |
| 1986 | 7 years | +0.0% |
| 1987 | 7 years | +0.0% |
| 1988 | 7 years | +0.0% |
| 1989 | 7 years | +0.0% |
| 1990 | 7 years | +0.0% |
| 1991 | 7 years | +0.0% |
| 1992 | 7 years | +0.0% |
| 1993 | 7 years | +0.0% |
| 1994 | 7 years | +0.0% |
| 1995 | 7 years | +0.0% |
| 1996 | 7 years | +0.0% |
| 1997 | 7 years | +0.0% |
| 1998 | 6 years | -14.3% |
| 1999 | 6 years | +0.0% |
| 2000 | 6 years | +0.0% |
| 2001 | 6 years | +0.0% |
| 2002 | 6 years | +0.0% |
| 2003 | 6 years | +0.0% |
| 2004 | 6 years | +0.0% |
| 2005 | 6 years | +0.0% |
| 2006 | 6 years | +0.0% |
| 2007 | 6 years | +0.0% |
| 2008 | 6 years | +0.0% |
| 2009 | 6 years | +0.0% |
| 2010 | 6 years | +0.0% |
| 2011 | 6 years | +0.0% |
| 2012 | 7 years | +16.7% |
| 2013 | 7 years | +0.0% |
| 2014 | 7 years | +0.0% |
| 2015 | 7 years | +0.0% |
| 2016 | 7 years | +0.0% |
| 2017 | 7 years | +0.0% |
| 2018 | 7 years | +0.0% |
| 2019 | 7 years | +0.0% |
| 2020 | 7 years | +0.0% |
| 2021 | 7 years | +0.0% |
| 2022 | 7 years | +0.0% |
| 2023 | 7 years | +0.0% |
| 2024 | 7 years | +0.0% |
| 2025 | 7 years | +0.0% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1970s | 6 years | 6 years | 6 years | 10 |
| 1980s | 6.6 years | 6 years | 7 years | 10 |
| 1990s | 6.8 years | 6 years | 7 years | 10 |
| 2000s | 6 years | 6 years | 6 years | 10 |
| 2010s | 6.8 years | 6 years | 7 years | 10 |
| 2020s | 7 years | 7 years | 7 years | 6 |
Countries ranked near Tonga
- 26 Albania 7 years compare
- 26 Azerbaijan 7 years compare
- 26 Burundi 7 years compare
- 26 Benin 7 years compare
- 26 Burkina Faso 7 years compare
- 26 Bangladesh 7 years compare
- 26 Belarus 7 years compare
- 26 Bermuda 7 years compare
- 26 Brazil 7 years compare
- 26 Brunei Darussalam 7 years compare
- 26 Central African Republic 7 years compare
- 26 Switzerland 7 years compare
- 26 Côte d'Ivoire 7 years compare
- 26 Cameroon 7 years compare
- 26 Congo 7 years compare
- 26 Comoros 7 years compare
- 26 Djibouti 7 years compare
- 26 Algeria 7 years compare
- 26 Eritrea 7 years compare
- 26 Fiji 7 years compare
- 26 France 7 years compare
- 26 Gabon 7 years compare
- 26 United Kingdom 7 years compare
- 26 Gibraltar 7 years compare
- 26 Guinea 7 years compare
- 26 Guadeloupe 7 years compare
- 26 French Guiana 7 years compare
- 26 Haiti 7 years compare
- 26 India 7 years compare
- 26 Iceland 7 years compare
- 26 Kazakhstan 7 years compare
- 26 Kyrgyzstan 7 years compare
- 26 Kiribati 7 years compare
- 26 Kuwait 7 years compare
- 26 Lao People's Democratic Republic 7 years compare
- 26 Liechtenstein 7 years compare
- 26 Luxembourg 7 years compare
- 26 Monaco 7 years compare
- 26 Madagascar 7 years compare
- 26 Malta 7 years compare
- 26 Mongolia 7 years compare
- 26 Mauritania 7 years compare
- 26 Martinique 7 years compare
- 26 Mauritius 7 years compare
- 26 New Caledonia 7 years compare
- 26 Niger 7 years compare
- 26 Nepal 7 years compare
- 26 New Zealand 7 years compare
- 26 Pakistan 7 years compare
- 26 French Polynesia 7 years compare
- 26 Réunion 7 years compare
- 26 Russia 7 years compare
- 26 Senegal 7 years compare
- 26 Solomon Islands 7 years compare
- 26 Sierra Leone 7 years compare
- 26 Saint Pierre and Miquelon 7 years compare
- 26 Suriname 7 years compare
- 26 Slovenia 7 years compare
- 26 Seychelles 7 years compare
- 26 Chad 7 years compare
- 26 Togo 7 years compare
- 26 Tajikistan 7 years compare
- 26 Tunisia 7 years compare
- 26 Tuvalu 7 years compare
- 26 Ukraine 7 years compare
- 26 Uzbekistan 7 years compare
- 26 Viet Nam 7 years compare
- 26 Vanuatu 7 years compare
- 26 Samoa 7 years compare
More education data for Tonga
- Primary education, teachers, gaps filled 818 (2024)
- Duration of pre primary education, annual growth rate 0 % change on previous year (2025)
- Duration of pre primary education 2 (2025)
- Official entrance age to pre primary education 4 (2025)
- Population ages 15-64 58.2% (2025)
- Population ages 0-14 34.9% (2025)
- Lower secondary school starting age 12 years (2025)
- Primary school starting age 6 years (2025)
- Primary secondary enrollment completion rates, gaps filled 108.79 (2024)
- School enrollment, primary 108.8% (2024)
Frequently asked questions
- What is theoretical duration of secondary education in Tonga?
- Theoretical duration of secondary education in Tonga was 7 years in 2025, according to UNESCO Institute for Statistics.
- What is the highest theoretical duration of secondary education recorded in Tonga?
- The highest recorded value was 7 years in 1984.
- What is the lowest theoretical duration of secondary education recorded in Tonga?
- The lowest recorded value was 6 years in 1970.
- How does Tonga rank for theoretical duration of secondary education?
- Tonga ranks 26th out of 215 countries with data for 2025.
- Is theoretical duration of secondary education rising or falling in Tonga?
- Over the last ten years it is unchanged. The long-run trend across the full record is rising.
- Where does this Tonga data come from?
- The figures come from UNESCO Institute for Statistics, published as part of Theoretical duration of secondary education (years). Statizoid updates them automatically from the source API.
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About this data
February 2026 Data Release