This article contains the lists of the busiest airports by region. It is organised by continent and links to the list of the busiest airports in the continent itself, in countries and in notable regions. 
Africa.
List of the busiest airports in Africa
Asia.
List of the busiest airports in Asia
Europe.
List of the busiest airports in Europe
North America.
List of the busiest airports in North America
Oceania.
List of the busiest airports in Oceania
South America.
List of the busiest airports in South America