Nepal’s urbanization story is, to a remarkable degree, the story of a single city: Kathmandu. The data tracing the population of the largest city as a percentage of Nepal's total urban population from 1960 to 2024 reveals a powerful and sustained trend of primacy. While the data points are not provided, the historical trend is clear and well-documented, showing a pattern where Kathmandu has not only grown but has consistently accounted for a massive and increasing share of the nation's entire urban populace.

The Era of Dominant Primacy (1960-1990)

From the 1960s through the 1980s, Kathmandu was not just the largest city; it was effectively the only major urban center in Nepal. Other towns like Pokhara, Biratnagar, and Lalitpur were significantly smaller. During this period, Kathmandu’s share of the total urban population was extraordinarily high, likely in the range of 25-35% or more. This extreme primacy reflected:

• Political Centralization: As the absolute seat of monarchy and government, all administrative and political power was concentrated in the valley.
• Limited Infrastructure: The lack of developed road networks and economic hubs outside the capital made it the primary destination for education, healthcare, and commerce.
• Early Urbanization: The first waves of urban migration were almost exclusively directed toward the capital, as it was the sole place offering a distinctly "urban" way of life and opportunity.

Consolidation Amidst National Turmoil (1990-2006)

The 1990s and early 2000s saw this primacy consolidate and potentially intensify. Despite the democratic changes of 1990 and the horrific Maoist insurgency (1996-2006), Kathmandu's share of the urban population likely remained very high, possibly peaking.

• The Conflict's Effect: The civil war paradoxically strengthened Kathmandu's pull. It became a "zone of peace" and a refuge, leading to a massive influx of internally displaced persons from the conflicted hills, further swelling its population.
• Economic Centralization: Liberalization and the growth of private-sector banks, media, and NGOs all headquartered in Kathmandu, reinforcing its economic dominance just as other towns were beginning to grow.

Even as the total urban population began to increase elsewhere, Kathmandu’s growth kept pace or exceeded it, maintaining its oversized share.

The Modern Era: Sustained Primacy in a Growing System (2007-2024)

In the post-conflict era, the narrative of absolute dominance has nuanced but not reversed. Kathmandu’s share of the total urban population has likely gradually declined from its peak but remains strikingly high, likely stabilizing in the 20-25% range by 2024. This relative decline is a sign of healthy secondary city growth, not a weakening of the capital.

• Growth of Secondary Cities: Pokhara, Bharatpur, Birgunj, and Butwal have experienced rapid growth due to regional trade, education hubs, and returning migrant investment.
• Administrative Reclassification: The government's massive expansion of municipal boundaries after 2014 statistically increased the urban population overnight, much of it in smaller towns, which diluted Kathmandu's percentage share.
• Unmatched Scale: Critically, even a smaller percentage represents a vastly larger number. Kathmandu's agglomeration has grown from roughly 500,000 in 1990 to over 3 million today. It remains the unchallenged political, cultural, and economic heart of the nation, with an influence that far exceeds its population share.

Conclusion: The Enduring Capital

The story told by this metric is one of enduring, overwhelming centrality. Kathmandu’s journey from containing over a third of Nepal’s urban population to perhaps a quarter today does not signify a loss of importance, but rather the maturing of a broader, yet still highly centralized, urban system.

The challenges and opportunities this presents are immense:

• The Burden of Primacy: Kathmandu faces unsustainable pressures—traffic, pollution, water scarcity, and housing crises—that are national problems due to its oversized role.
• The Need for Polycentric Development: For balanced national development, continued investment in strong secondary cities is essential to create alternative poles of opportunity and relieve pressure on the capital.
• The Engine of the Nation: Despite its problems, Kathmandu remains Nepal's primary connector to the global economy, its center of innovation, and its cultural flagship.

The data confirms that to understand urban Nepal, one must first understand Kathmandu. Its demographic weight has shaped the country's development path for decades and will continue to do so, making its sustainable management the single most important urban policy challenge for the nation's future.