A high-income economy is defined by the World Bank as a country with a gross national income per capita of US$14,005 or more in 2023, calculated using the Atlas method.
The term "first world" commonly refers to countries that aligned themselves with the U.S. and NATO during the Cold War.
Several institutions, such as the Central Intelligence Agency (CIA) or International Monetary Fund (IMF), take factors other than high per capita income into account when classifying countries as "developed" or "advanced economies".
According to the World Bank the following 86 countries (including territories) are classified as "high-income economies".
Countries with a GNI per capita (calculated using the Atlas method) above this threshold are classified by the World Bank as "high-income economies".