Saudi Arabia vs United States

Saudi Arabia scores 76.5 in the NationsTree Index (15th in the world) and United States scores 72.3 (30th), a gap of 4.2 points. Their trees are 35 m and 115 m tall; tree height grows with real GDP and is adjusted by the index.

United States has 9.2 times the population of Saudi Arabia. United States is 4.6 times larger than Saudi Arabia by land area. United States has an economy 11 times the size of Saudi Arabia (GDP at purchasing power parity). Population: Saudi Arabia 37.0 million and United States 341.8 million (2025).

GDP per person at purchasing power parity is $90,027 in United States and $73,784 in Saudi Arabia (2025, international dollars). Life expectancy is almost the same: 79.0 and 78.9 years.

Of 34 indicators reported by both countries, Saudi Arabia ranks higher in the world on 14 and United States on 20. Saudi Arabia is clearly stronger in economy and main industries. United States is clearly stronger in environment & energy, science & innovation and natural resources.

As a nation, Saudi Arabia is the older of the two (statehood since 1727, 299 years), compared with United States (since 1776). Over the last five years Saudi Arabia improved faster (direction score 100 vs 24 out of 100).