Indicator	Value
Total population	11,900 peopleUN DESA WPP [2024] 11,950 people·World Bank WDI [2024] 11,950 people
Median age	20.3 yearsUN DESA WPP [2024]
Life expectancy	62.1–62.3 yearsWorld Bank WDI [2024] 62.28 years·UNDP HDI [2023] 62.11 years
Ethnic groups	Nauruan 94.6%, I-Kiribati 2.2%, Fijian 1.3%, other 1.9% (2021 est.)CIA World Factbook [2025] · 2026 archive
Languages	Nauruan 93% (official, a distinct Pacific Island language), English 2% (widely understood, spoken, and used for most government and commercial purposes), other 5% (includes Gilbertese 2% and Chinese 2%) (2011 est.); note: data represent main language spoken at home; Nauruan is spoken by 95% of the population, English by 66%, and other languages by 12%CIA World Factbook [2025] · 2026 archive
Religions	Protestant 60.4% (Nauruan Congregational 34.7%, Assemblies of God 11.6%, Pacific Light House 6.3%, Nauru Independent 3.6%, Baptist 1.5, Seventh Day Adventist 1.3%, other Protestant 1.4%), Roman Catholic 33.9%, other 4.2%, none 1.3%, no answer 0.3% (2021 est.)CIA World Factbook [2025] · 2026 archive
Urbanization	100% of total population (2023)CIA World Factbook [2025] · 2026 archive
Population growth	0.604 %World Bank WDI [2024]
Birth rate	24.6 per 1,000World Bank WDI [2024]
Death rate	7.57 per 1,000World Bank WDI [2024]
Urban population	100 %World Bank WDI [2024]
Languages (structured)	Chinese Pidgin English / Kosraean / Nauru / TuvaluGlottolog [2026]