According to the 2010 revison of the World Population Prospects the total population was 165,000 in 2010, compared to only 60,000 in 1950. The proportion of children below the age of 15 in 2010 was 40.3%, 55.8% was between 15 and 65 years of age, while 3.9% was 65 years or older.
São Tomé and Príncipe is a small nation composed of an archipelago located in the Gulf of Guinea of the equatorial Atlantic Ocean. The nation's main islands are São Tomé Island and Príncipe Island, for which the country is named. These are located about 300 and 250 kilometres (190 and 160 mi), respectively, off the northwest coast of Gabon in Central Africa. The nation's geographic coordinates are a latitude of 1°00′N and a longitude of 7°00′E.
The Contador River is located in the northwest of São Tomé and its river valley is possibly the deepest in the country. Several streams run down from the volcanic highlands into the Gulf of Guinea.There are no significant lakes on São Tomé and Príncipe.