| Official name | Kingdom of TongaCIA World Factbook [2025] · 2026 archive |
| Government type | Constitutional monarchyCIA World Factbook [2025] · 2026 archive |
| Capital | Nuku'alofaGeoNames [2024] |
| Head of state | TUPOU VI (King)CIA World Leaders [2025] |
| Total area | 750 km²World Bank WDI [2023] |
| Total population | 104,000 peopleUN DESA WPP [2024] 104,200 people·World Bank WDI [2024] 104,200 people |
| Languages | Tongan only 85%, Tongan and other language 13.9%, Tongan not used at home 1.1% (2021 est.); note: data represent language use at home of persons aged 5 and olderCIA World Factbook [2025] · 2026 archive |
| GDP (nominal) | 591,000,000 US$World Bank WDI [2023] |
| GDP per capita | 5,650 US$World Bank WDI [2023] |
| Life expectancy | 72.9–73.1 yearsWorld Bank WDI [2024] 73.07 years·UNDP HDI [2023] 72.9 years |
