What was the world first megacity?

Answer 1

The world's first megacity is often considered to be New York City, which reached a population of over 10 million in the early 20th century. However, some argue that ancient cities like Babylon or Rome could also be classified as early megacities due to their significant populations and influence. Ultimately, the term "megacity" typically refers to modern urban centers with populations exceeding 10 million, with New York City being a prominent example during its peak.