Urbanisation: Global & UK Patterns

A Planet Becoming Urban

In 1800 just 3% of the world lived in cities. By 1900 the figure was 14%; in 2007 it crossed 50% for the first time; today it stands at over 56% and the UN forecasts 68% by 2050. Urbanisation — the rising share of people living in towns and cities — is the defining demographic shift of modern history. But the pace varies enormously: developed countries urbanised slowly between 1800 and 1950 and have plateaued; emerging countries are urbanising fastest right now; many developing countries still have the highest growth rates of all and will dominate the next century’s urban population.

Three Speeds of Urbanisation

In developed countries (UK, USA, Japan), urbanisation began with the Industrial Revolution — people moved from farms to factories in Manchester, Pittsburgh and Osaka. By 1950 most populations were already urban, and the trend slowed. The UK is now 84% urban; growth comes from international migration and small-town expansion rather than rural-to-urban movement. In emerging countries (China, India, Brazil), urbanisation is happening fast right now. China’s urban population grew from 26% in 1990 to 64% in 2024 — over half a billion people moved to cities in 30 years. In developing countries (Ethiopia, Bangladesh, DR Congo), cities are growing fast but most people are still rural; this is where the biggest urban explosion is still ahead. Africa’s urban population is projected to triple by 2050.

Causes of Urbanisation

Urbanisation is driven by push and pull factors. Push factors include rural poverty, drought and crop failure, mechanisation that cuts farm jobs, conflict, and lack of services such as healthcare and secondary schools. Pull factors are the opposite: city jobs in industry and services, higher wages, hospitals and universities, electricity and clean water, and the perceived opportunity for a different life. Urbanisation also involves natural increase within cities — young migrants are typically of childbearing age, so birth rates spike. In emerging countries the pull factor is strongest where new manufacturing zones (Shenzhen, Bangalore) attract young workers in their millions.

UK Distribution of Cities

The UK’s urban population sits in clear clusters. Greater London dominates with about 9.1 million people — roughly one in seven of the entire UK. The Midlands conurbation around Birmingham (2.4 million) was built on Industrial Revolution metalworking. The North-West conurbation around Manchester and Liverpool (2.8 million) grew from cotton mills and Atlantic shipping. The Yorkshire conurbation (Leeds, Sheffield, Bradford, 2 million) grew from wool, steel and coal. Scotland clusters in the Central Belt around Glasgow and Edinburgh (1.7 million). Outside these clusters, the UK is sparsely populated — Highland Scotland, Mid Wales and rural East Anglia have densities below 25 people/km².

Why the UK’s Cities Sit Where They Do

UK city locations reflect history more than current geography. Cities grew where the Industrial Revolution found coal (the South Wales valleys, the Midlands, the North-East), iron ore (Sheffield), fast water for early mills (Pennine valleys), or port access for trade (Liverpool, Glasgow, Hull). London grew on a tidal Thames at the lowest crossable bridging point. Once industry collapsed in the 1970s and 80s — coal mines closed, Sheffield steel halved, Manchester cotton vanished — cities had to remake themselves around services, finance and digital industries. Some succeeded (Manchester through Media City and the universities); some still struggle (parts of South Wales and the North-East have not recovered the jobs they lost). The UK government’s ‘levelling up’ agenda from 2019 was an explicit response to this regional inequality.