| Total population | 1,240,000 peopleUN DESA WPP [2024] 1,243,000 people·World Bank WDI [2024] 1,243,000 people |
| Median age | 22.2 yearsUN DESA WPP [2024] |
| Life expectancy | 64.1–64.3 yearsWorld Bank WDI [2024] 64.26 years·UNDP HDI [2023] 64.12 years |
| Ethnic groups | predominantly Swazi; smaller populations of other African ethnic groups, including the Zulu, as well as people of European ancestryCIA World Factbook [2025] · 2026 archive |
| Languages | English (official, used for government business), siSwati (official)CIA World Factbook [2025] · 2026 archive |
| Religions | Christian 90% (Zionist - a blend of Christianity and traditional African religions - 40%, Roman Catholic 20%, other Christian 30% - includes Anglican, Methodist, Church of Jesus Christ, Jehovah's Witness), Muslim 2%, other 8% (includes Baha'i, Buddhist, Hindu, indigenous, Jewish) (2015 est.)CIA World Factbook [2025] · 2026 archive |
| Urbanization | 24.8% of total population (2023)CIA World Factbook [2025] · 2026 archive |
| Population growth | 0.996 %World Bank WDI [2024] |
| Birth rate | 23.6 per 1,000World Bank WDI [2024] |
| Death rate | 7.73 per 1,000World Bank WDI [2024] |
| Urban population | 26.2 %World Bank WDI [2024] |
| Languages (structured) | Nyanja / Swati / Tsonga / ZuluGlottolog [2026] |