Indicator	Value
Total population	5,260,000–5,400,000 peopleUN DESA WPP [2024] 5,255,000 people·World Bank WDI [2024] 5,396,000 people
Median age	38.7 yearsUN DESA WPP [2024]
Life expectancy	82.4–83 yearsWorld Bank WDI [2024] 83.01 years·UNDP HDI [2023] 82.41 years
Ethnic groups	Irish 76.6%, Irish travelers 0.6%, other White 9.9%, Asian 3.3%, Black 1.5%, other (includes Arab, Roma, and persons of mixed backgrounds) 2%, unspecified 2.6% (2022 est.)CIA World Factbook [2025] · 2026 archive
Languages	English (official, the language generally used), Irish (Gaelic or Gaeilge) (official, spoken by approximately 37.7% of the population)CIA World Factbook [2025] · 2026 archive
Religions	Roman Catholic 69.2% (includes lapsed), Protestant 3.7% (Church of Ireland/England/Anglican/Episcopalian 2.5%, other Protestant 1.2%), Orthodox 2%, other Christian 0.9%, Muslim 1.6%, other 1.4%, agnostic/atheist 0.1%, none 14.5%, unspecified 6.7% (2022 est.)CIA World Factbook [2025] · 2026 archive
Urbanization	64.5% of total population (2023)CIA World Factbook [2025] · 2026 archive
Population growth	1.57 %World Bank WDI [2024]
Birth rate	10 per 1,000World Bank WDI [2024]
Death rate	6.5 per 1,000World Bank WDI [2024]
Urban population	64.3 %World Bank WDI [2024]
Languages (structured)	Early Irish / English / Irish / Irish Anglo-Norman / Irish Sign Language / SheltaGlottolog [2026]