Largest cities by population, worldwide or within one country or first-level div...

{ "method": "GET", "queryParams": { "country": "BR", "limit": 5 }, "type": "http" }

{ "example": { "asOf": "2026-10-21T06:28:05.903Z", "attribution": "City data: GeoNames (geonames.org), licensed CC BY 4.0, cities15000 snapshot 2026-10-21. Crowd-edited; populations and coordinates may be dated.", "cities": [ { "admin1Code": "27", "admin1Name": "Sao Paulo", "asciiName": "Sao Paulo", "country": "BR", "countryName": "Brazil", "elevationM": 769, "geonameId": 3448439, "lat": -23.5475, "lon": -46.63611, "name": "São Paulo", "population": 12400232, "rank": 1, "role": "first-level administrative seat", "timezone": "America/Sao_Paulo" }, { "admin1Code": "21", "admin1Name": "Rio de Janeiro", "asciiName": "Rio de Janeiro", "country": "BR", "countryName": "Brazil", "elevationM": 12, "geonameId": 3451190, "lat": -22.90642, "lon": -43.18223, "name": "Rio de Janeiro", "population": 6747815, "rank": 2, "role": "first-level administrative seat", "timezone": "America/Sao_Paulo" } ], "citiesInScope": 2277, "degraded": false, "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.", "notChecked": [ "urban agglomeration or metro-area populations (figures are for the named city proper as GeoNames records it)", "whether populations are current (sources and years vary)", "…1 more" ], "offset": 0, "reasons": [ "GeoNames also lists some boroughs and district seats (for example Brooklyn, Queens, Paris arrondissements) as separate places, so a city can appear next to its own parts.", "Populations are GeoNames' figure for the city proper and can mix years and definitions; do not compare across countries as if they were one census." ], "returned": 5, "scope": "Brazil", "source": "GeoNames cities15000 (CC BY 4.0)", "summary": "Largest in Brazil: São Paulo, 12,400,232; 2277 cities ranked.", "truncated": true, "verdict": "RANKED" }, "type": "json" }