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Population

GeoNames Population API

GeoNames

GeoNames's GeoNames Population API provides access to city populations, country populations, postal codes and more. Global coverage, updated weekly. Free tier available.

City populationsCountry populationsPostal codesTimezones

API KeyFreeWeeklyGlobal

SO 171 Q's

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Korea KOSIS API

통계청

Korean Statistical Information Service. Official Korean national statistics.

Korea PopulationBirth RateDeath RateHousehold StatisticsRegional Breakdown

API KeyFreeMonthlyCountry

Quick start

const res = await fetch(
  `https://kosis.kr/openapi/Param/statisticsParamData.do?method=getList&apiKey=${process.env.KOSIS_API_KEY}&itmId=T+&objL1=ALL&format=json&jsonVD=Y&prdSe=Y&startPrdDe=2022&endPrdDe=2023&orgId=101&tblId=DT_1IN1502`
);
const data = await res.json();
data.slice(0, 3).forEach(d => console.log(`${d.C1_NM}: ${d.DT}`));

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REST Countries API

REST Countries

REST Countries's REST Countries API provides access to country info, population, capital and more. Global coverage, updated monthly. No authentication required.

Country infoPopulationCapitalCurrenciesLanguagesFlags

No AuthFreeMonthlyGlobal

SO 171 Q's

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UN Population Division API

United Nations

World Population Prospects. Demographic data, fertility, mortality, migration.

Total PopulationFertility RateMortality RateMigrationPopulation Projections

No AuthFreeAnnualGlobal

Quick start

const res = await fetch(
  'https://population.un.org/dataportalapi/api/v1/data/indicators/49/locations/900/start/2020/end/2024?format=json'
);
const { data } = await res.json();
data.slice(0, 5).forEach(d => console.log(`${d.timeLabel}: ${(d.value / 1e9).toFixed(2)}B people`));

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US Census Bureau API

U.S. Census Bureau

US population, housing, economic, and business data from the Census Bureau.

US PopulationHousehold IncomeHousing DataDemographic BreakdownBusiness Statistics

API KeyFreeAnnualCountry

Quick start

const res = await fetch(
  `https://api.census.gov/data/2022/acs/acs1?get=NAME,B01003_001E&for=state:*&key=${process.env.CENSUS_API_KEY}`
);
const [header, ...rows] = await res.json();
rows.slice(0, 5).forEach(r => console.log(`${r[0]}: ${Number(r[1]).toLocaleString()} people`));

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World Bank Population API

World Bank

World Bank's World Bank Population API provides access to population total, growth rate, age structure and more. Global coverage, updated annual. No authentication required.

Population totalGrowth rateAge structureUrban population

No AuthFreeAnnualGlobal

SO 171 Q's

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Worldometers

Real-time world statistics. Population, births, deaths, CO2, and more.

Live World PopulationDaily BirthsDaily DeathsNet MigrationPopulation Growth Rate

No AuthFreeReal-timeGlobal

Quick start

// Worldometers has no official API — use public data or a wrapper
const res = await fetch('https://disease.sh/v3/covid-19/all');
const { population, cases, deaths } = await res.json();
console.log(`World population: ${population.toLocaleString()}`);
console.log(`Total COVID cases: ${cases.toLocaleString()}`);

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WorldPop API

University of Southampton

University of Southampton's WorldPop API provides access to gridded population, age/sex structure, urban-rural and more. Global coverage, updated annual. No authentication required.

Gridded populationAge/sex structureUrban-ruralMigration

No AuthFreeAnnualGlobal

SO 171 Q's

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