Urbanization in Pakistan is officially measured through an administrative classification system that defines urban areas as metropolitan and municipal corporations, committees, and cantonments based on population size, rather than functional urban regions, contiguity, density or urban character. This results in a significant underestimation of the country’s urban reality.¹

While official estimates place the urban population at roughly 38-39 percent, growing at 2.3-2.6 percent annually ^2,3, recent World Bank diagnostics using the “Degree of Urbanization” methodology suggest that nearly 70 percent of Pakistan’s population may live in functionally urban settlements when peri-urban and densely populated areas are included.⁴ Urban growth has evolved from post-independence concentration in Karachi and Lahore to expanding secondary cities and contiguous peri-urban regions. Unlike global urban centers that leveraged migration to pool highly skilled talent, productivity, and innovation to spur growth, Pakistan’s cities largely absorb unskilled populations from rural areas to add to urban poverty, unemployment, social friction and regional disparities, intensifying pressures on housing, infrastructure, public health and social protection systems.

Internal Migration as Structural Response, Not Anomaly

Internal migration in Pakistan can best be defined as a designed consequence of uneven development rather than an irregular demographic pattern or a deliberately managed policy tool, as seen in more coordinated spatial strategies such as China. People move from rural areas to cities as a practical choice to access better jobs, services, and living standards. In rural regions, limited landholdings, weaker agriculture sector, few employment opportunities, compromised public services, and rising climate pressures such as floods, heatwaves, and water scarcity act as strong push factors.³ In contrast, cities like Karachi, Lahore, and Islamabad attract migrants through more diverse job markets, better education, stronger healthcare, and greater social mobility.⁴ These movements are not random but closely follow spatial gaps in opportunity. World Bank research highlights that internal migration is a structural outcome of uneven development, where people move towards places offering higher returns to skills, income, and wellbeing rather than reacting to short-term shocks, social inclination or administrative distortions.²

Urbanization and the Geography of Opportunity

Rampant urbanization in major cities reflects persistent disparities in access to employment, education, healthcare, infrastructure, and economic mobility. These spatial inequalities are rooted in colonial-era infrastructure patterns and post-independence development choices that concentrated investment, infrastructure augmentation, and economic activity in a limited number of urban centers.^1,4 Consequently, households often migrate not by preference but in pursuit of better livelihoods and upward social mobility. This has produced a distinct “Geography of Opportunity,” where economic and social advantages are concentrated in metropolitan regions while many rural and peripheral areas remain marginalized. The resulting migration flows reinforce urban expansion and place increasing pressure on a couple of major cities. This pattern aligns with theories of agglomeration economies, growth poles, and cumulative causation, which explain how economic activity and investments tend to cluster spatially and generate self-reinforcing advantages.^{6, 7} The composite “Opportunity Index” used in the illustrations serves as a proxy for these dynamics, clearly highlighting the dominant role of cities such as Karachi, Lahore, and Islamabad as national opportunity hubs which leaves other regions far behind.