The world's most populous city has shifted dramatically, with Jakarta surpassing Tokyo in a recent United Nations report. This shift reflects a broader trend of rapid urbanization and the rise of densely populated megacities. With an estimated population of nearly 42 million, Jakarta has skyrocketed from 33rd place in 2018 to the top spot. Dhaka, Bangladesh, follows closely behind with 36 million residents, poised to become the world's largest city by mid-century. This trend is a testament to the global shift towards urbanization, with nearly half of the planet's population now living in cities. Asia dominates this trend, hosting nine out of the ten most populated cities globally. Cairo, Egypt, is the only exception, ranked 7th with a population of 25 million, surpassing New York City's population. The top 10 cities also include New Delhi, Shanghai, Guangzhou, Manila, Kolkata, and Seoul. The rise of megacities is a defining force of our time, with 33 megacities globally in 2025, 19 of which are in Asia. The U.N. projects a dramatic increase in the number of cities by 2050, with most having populations under 250,000. Dhaka is projected to become the world's most populous city by 2050, while Tokyo's population is expected to decline due to Japan's aging population. Jakarta's rapid growth and challenges, including earthquakes, flooding, overcrowding, and pollution, have sparked discussions about its future. The Indonesian government has proposed moving the capital to Nusantara in Borneo, a move that has faced setbacks, including construction delays and a lack of foreign investment. This shift in the world's most populous city highlights the need for sustainable urban development and inclusive policies to address the challenges of urbanization.
