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45. Rajkot, India
> Population density: 42,821 people per square mile
> Population: 1.7 million
> Built-up land area in city: 39 square miles
Source: Kayihan Bolukbasi / iStock via Getty Images
44. Alexandria, Egypt
> Population density: 42,982 people per square mile
> Population: 4.9 million
> Built-up land area in city: 113 square miles
Source: Denis Vostrikov / iStock via Getty Images
43. Vijayawada, India
> Population density: 43,229 people per square mile
> Population: 1.5 million
> Built-up land area in city: 35 square miles
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42. Kurnool, India
> Population density: 43,333 people per square mile
> Population: 650,000
> Built-up land area in city: 15 square miles
Source: mtcurado / iStock via Getty Images
41. Douala, Cameroon
> Population density: 43,385 people per square mile
> Population: 3.4 million
> Built-up land area in city: 78 square miles
