| Total population | 3,540,000 peopleUN DESA WPP [2024] 3,536,000 people·World Bank WDI [2024] 3,536,000 people |
| Median age | 18.9 yearsUN DESA WPP [2024] |
| Life expectancy | 68.6–68.9 yearsWorld Bank WDI [2024] 68.89 years·UNDP HDI [2023] 68.62 years |
| Ethnic groups | Tigrinya 50%, Tigre 30%, Saho 4%, Afar 4%, Kunama 4%, Bilen 3%, Hedareb/Beja 2%, Nara 2%, Rashaida 1% (2021 est.); note: data represent Eritrea's nine recognized ethnic groupsCIA World Factbook [2025] · 2026 archive |
| Languages | Tigrinya (official), Arabic (official), English (official), Tigre, Kunama, Afar, other Cushitic languagesCIA World Factbook [2025] · 2026 archive |
| Religions | Eritrean Orthodox, Roman Catholic, Evangelical Lutheran, Sunni MuslimCIA World Factbook [2025] · 2026 archive |
| Urbanization | 43.3% of total population (2023)CIA World Factbook [2025] · 2026 archive |
| Population growth | 1.86 %World Bank WDI [2024] |
| Birth rate | 28.7 per 1,000World Bank WDI [2024] |
| Death rate | 6 per 1,000World Bank WDI [2024] |
| Urban population | 34.5 %World Bank WDI [2024] |
| Languages (structured) | Adamawa Fulfulde / Afar / Beja / Bilin / Dahalik / Geez / Kunama / Nara / Qimant / Saho / Standard Arabic / Sudanese Arabic / Ta'izzi-Adeni Arabic / Tigre / TigrinyaGlottolog [2026] |