The world’s next growth story will not begin in boardrooms in New York or factories in East Asia. Rather, it is already taking shape in the streets of Lagos, Nairobi, Abidjan, Dar es Salaam, and dozens of other cities that barely featured in global economic thinking a generation ago.

Sub-Saharan Africa is entering a phase in which demographics, urbanisation, and consumption are beginning to align in the ways that once defined East Asia’s rise.

This is according to the International Monetary Fund (IMF) in its latest Regional Economic Outlook: Sub-Saharan Africa.

The starting point is age. Sub-Saharan Africa has the youngest population of any major region in the world, with a median age of around 19 years, compared with roughly 32 in Asia’s developing countries, and over 43 in Europe.

The IMF notes that over the next two decades Sub-Saharan Africa will account for most of global labour-force growth, at a time when workforces in China, Europe, Japan, and even parts of Latin America, are shrinking. Where other regions are grappling with ageing, Africa is still growing into its productive years.

Urbanisation is also an important factor in Africa’s economic rise. Its cities are no longer peripheral to the global economy. The continent now has more than 90 cities with populations exceeding one million, most of these in Sub-Saharan Africa, a figure that has risen sharply over the past two decades. This is more than the number of cities with more than one million people in both Europe and North America.

Lagos alone ranks among the world’s largest metropolitan economies, while cities such as Kinshasa, Addis Ababa, Nairobi, and Dar es Salaam are expanding at rates that rival Asian urban centres during their industrial take-off years. Urbanisation is accelerating demand for housing, transport, food supply chains, energy, digital services, and consumer goods, creating dense markets that reward scale, logistics, and investment.

This matters because growth is no longer being driven by commodities alone. The IMF notes that Africa’s fastest-growing economies are those where the services, light manufacturing, agribusiness, and digital sectors are expanding alongside traditional resource extraction. Rising urban populations with incomes, even modest ones, are generating consumption growth that is more stable than commodity cycles. In effect, Africa is beginning to look less like a collection of export enclaves and more like a set of integrated domestic markets.

Crucially, the scale is now large enough to matter globally. By the early 2030s, Africa’s urban population is expected to exceed that of China. The IMF argues that, if productivity gains can be sustained through infrastructure investment, trade integration, and regulatory reform, the continent could become one of the world’s primary engines of demand growth, absorbing exports, capital, and technology at a time when other regions slow.

But there are still risks. Youths without jobs can become a liability rather than an asset. Infrastructure gaps, policy uncertainty, and governance failures remain binding constraints in many countries. Yet the direction of travel is clear. Africa’s demographic structure, combined with rapid urbanisation and expanding city-based markets, resembles the early conditions that preceded growth surges elsewhere in the world.

Africa is no longer a marginal growth story waiting for aid or commodities. It is becoming a central arena where global growth will be decided, shaped not by distant capitals, but by Africans themselves, through the energy of the continent’s young cities and the scale of its growing consumer market.