Future population growth is highly dependent on the path that future fertility will take and according to the World Population Prospects, 2015 Revision (United Nations), global fertility is projected to fall from 2.5 children per woman in 2010-2015 to 2.4 in 2025-2030 and 2.0 in 2095-2100.
Even assuming that fertility levels will continue to decline, the global population is still expected to reach 8.5 billion in 2030, 9.7 billion in 2050 and 11.2 billion in 2100, according to the medium projection variant. In 2016, it is projected that 83 million people will be added to the world’s population.
In the United States, fertility is projected to rise from 1.89 children per woman in 2010-2015 to 1.92 in 2045-2050. Below is a world map of Total fertility, 2050-2055.
Other key findings:
Continued population growth until 2050 is almost inevitable, even if the decline of fertility accelerates. There is an 80 per cent probability that the population of world will be between 8.4 and 8.6 billion in 2030, between 9.4 and 10 billion in 2050 and between 10 and 12.5 billion in 2100.
Globally, the number of persons aged 60 and above is expected to more than double by 2050 and more than triple by 2100, increasing from 901 million in 2015 to 2.1 billion in 2050 and 3.2 billion in 2100. Sixty-six per cent of the increase between 2015 and 2050 will occur in Asia, 13 per cent in Africa, 11 per cent in Latin America and the Caribbean, and the remaining 10 per cent in other areas.
The number of persons aged 80 or over is projected to more than triple by 2050 and to increase more than seven-fold by 2100. Globally, the number of persons aged 80 or over is projected to increase from 125 million in 2015 to 434 million in 2050 and 944 million in 2100. In 2015, 28 per cent of all persons aged 80 and over lived in Europe, but that share is expected to decline to 16 per cent by 2050 and 9 per cent by 2100 as the populations of other major areas continue to increase in size and to grow older themselves.
Globally, the median age is projected to increase from 30 to 36 years between 2015 and 2050 and to 42 years in 2100. The median age is higher in countries or regions that have been experiencing low fertility for a long time. Europe today has the oldest population, with a median age of 42 years in 2015, which is expected to reach 46 years in 2050 and then 47 years in 2100. By comparison, the median age for the least developed countries as a whole is 20 years in 2015 and is projected to reach 26 years in 2050 and 36 years in 2100.
United Nations. 2015.
World Population Prospects: The 2015 Revision.
Department of Economic and Social Affairs, Population Division.
U.S. Census Bureau. March 2015.
“Projections of the Size and Composition of the U.S. Population: 2014 to 2060.”
The Department of Economic and Social Affairs of the United Nations provides population projections for the period 2015-2100. Projections are presented for five-year periods. Below are world maps of life expectancy at birth for females and males, 2050-2055.
In the United States, life expectancy at birth for females is projected to rise 10 years from 80-85 years in 2015 to 90-95 years in 2050. For men, it will rise 10 years from 75-80 years to 80-85 years.
United Nations. 2015.
“World Population Prospects: The 2015 Revision.”