| Total population | 6,340,000 peopleUN DESA WPP [2024] 6,338,000 people·World Bank WDI [2024] 6,338,000 people |
| Median age | 27.4 yearsUN DESA WPP [2024] |
| Life expectancy | 72.1–72.3 yearsWorld Bank WDI [2024] 72.3 years·UNDP HDI [2023] 72.1 years |
| Ethnic groups | Mestizo 86.3%, White 12.7%, Indigenous 0.2% (includes Lenca, Kakawira, Nahua-Pipil), Black 0.1%, other 0.6% (2007 est.)CIA World Factbook [2025] · 2026 archive |
| Languages | Spanish (official), Nawat (among some indigenous)CIA World Factbook [2025] · 2026 archive |
| Religions | Roman Catholic 43.9%, Protestant 39.6% (Evangelical - unspecified 38.2%, Evangelical - Methodist 1.3%, Evangelical - Baptist 0.1%), none 16.3%, unspecified 0.2% (2023 est.)CIA World Factbook [2025] · 2026 archive |
| Urbanization | 75.4% of total population (2023)CIA World Factbook [2025] · 2026 archive |
| Population growth | 0.452 %World Bank WDI [2024] |
| Birth rate | 15.6 per 1,000World Bank WDI [2024] |
| Death rate | 7.47 per 1,000World Bank WDI [2024] |
| Urban population | 75.1 %World Bank WDI [2024] |
| Languages (structured) | Cacaopera / Lenca-Salvador / Pipil / Poqomam / Q'eqchi' / Salvadoran Sign Language / SpanishGlottolog [2026] |