Population and demographics

21,565 entity-year observations of period life expectancy at birth in years for 236 countries and 29 regions, income groups and historical entities (world and continental aggregates carry OWID codes such as OWID_WRL; UN regional and income-group aggregates have no code), 1543 to 2023, from Our World in Data's life-expectancy grapher export as of 2026-09-06.

15,720 county-year rows for all 3,144 US counties and county equivalents, 2020 to 2024, with the July 1 population estimate and the components of change (births, deaths, natural change, international, domestic and net migration), keyed by five-digit county FIPS and year, from the Census Bureau's Vintage 2024 county totals file as of 2026-09-06.

17,066 entity-year observations of the child mortality rate, the estimated share of newborns who die before reaching age five in percent of live births, for 200 countries and 13 regions, income groups and the world (aggregates carry OWID codes such as OWID_WRL), 1751 to 2024, from Our World in Data's child-mortality grapher export as of 2026-09-06. The series splices Gapminder's long-run estimates with UN Inter-agency Group for Child Mortality Estimation data from 1932 onward, preferring UN IGME where both exist.

58,824 entity-year rows of population estimates for every country, region and the world, with historical estimates and UN medium-variant projections, from Our World in Data's population series as of 2026-09-05.

3,040 country-year observations of the resident population on 1 January (both sexes, all ages) for 59 geographies (EU and euro-area aggregates, every EU member state, Germany including the former GDR, metropolitan France, EFTA countries, the UK, candidate countries and neighbouring states such as Russia, Ukraine, Belarus and the Caucasus), 1960 to 2025, from the Eurostat dissemination API as of 2026-09-06. Each value is dated to the 1 January it refers to; Eurostat's break, estimate and provisional flags are not carried.

99,936 country-year observations for 12 World Development Indicators on health spending, physicians and hospital beds, under-5 and maternal mortality, fertility, DPT immunisation, primary and secondary enrolment, adult literacy and education spending, covering 264 countries and aggregates, 1960 to 2025, from the World Bank API as of 2026-09-06. Long format with indicator code and name on every row.