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NationsTree / Open data

Open data & API

Everything shown on the site can be downloaded. Files are regenerated after every data refresh and carry the source of each series.

Downloads

2026-10-26
README.txtRead me first1 KB
countries.csvCountries, regions, founding years33 KB
catalog.jsonAll indicators with sources and licences58 KB
nationstree_index.csv.gzNationsTree Index and tree height, all years131 KB
observations_all.csv.gzAll values, all indicators, all years (long format)4,737 KB

Per-indicator files: /downloads/indicators/<code>.csv.gz · checksums in manifest.json

JSON API

v1 · 120 req/min
GET /api/v1/countries
GET /api/v1/countries/POL?year=2020
GET /api/v1/indicators
GET /api/v1/series?indicator=life_expectancy&countries=POL,DEU&from=2000
GET /api/v1/explore?year=2024
GET /api/v1/forest?c=USA,CHN,IND

Free, read-only, no key needed. Every response includes the data date, attribution and licence. API keys with higher limits for large users are planned.

How to cite

Cite NationsTree and the original source of the figures you use (named on each page and in every file). Each country page, ranking and comparison has its own Cite button.

NationsTree. (2026). NationsTree: open country statistics and NationsTree Index [Data set; data as of 26 October 2026]. NationsTree.org. Retrieved 27 October 2026, from https://nationstree.org/
Data as of 26 October 2026 · original sources under their own licences (mostly CC BY 4.0)
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