Hong Kong
1,114 km²
San Diego
964 km²
China
United States
Area Comparison
Hong Kong is 1.2x larger than San Diego
Population Comparison
Hong Kong has 5.3x more people than San Diego
In terms of area, Hong Kong is 1.2x the size of San Diego. Hong Kong spans 1,114 km² (430 mi²) while San Diego covers 964 km² (372 mi²) — a difference of 150 km².
To put Hong Kong's size in perspective, its area of 1,114 km² is about 1.2x the size of Berlin. Meanwhile, San Diego at 964 km² is roughly the same size as Berlin.
Picture Hong Kong another way: its area is large enough to fit about 156,000 American football fields, 19 times the area of Manhattan, or 11 times the area of Paris. For San Diego, that's about 135,000 American football fields, 16 times the area of Manhattan, or 9 times the area of Paris.
Hong Kong is a special administrative region of China. Situated on China's southern coast just south of Shenzhen, it consists of Hong Kong Island, Kowloon, and the New Territories. With 7.5 million residents in a 1,114-square-kilometre (430 sq mi) territory, Hong Kong is the fourth-most densely populated region in the world.
Known as "Pearl of the Orient", Hong Kong covers 1,114 km² with a population of 7.4 million. The city was established in 1841. Hong Kong is known for Victoria Harbour, Victoria Peak, Star Ferry, among other attractions. The city's main transit system is the MTR Hong Kong.
Hong Kong squeezes 7.5 million residents into 1,114 km2, making it the world's fourth-most densely populated region.
San Diego is a city on the Pacific coast of Southern California, adjacent to the Mexico–United States border. It is the eighth-most populous city in the U.S. and second-most populous city in California with a population of over 1.4 million, while the San Diego metropolitan area with over 3.3 million residents is the 18th-largest metropolitan area in the country. San Diego is the county seat of San Diego County.
Often called "America's Finest City", San Diego has an area of 964 km² and is home to 1.4 million people. It was established in 1769. Visitors come for San Diego Zoo, Balboa Park, Coronado Beach, and much more.
San Diego sits directly on the Mexico-United States border, making it California's southwesternmost major city.
Hong Kong has a population density of 6,652 people per km² — a densely populated city. San Diego, with 1,442 people per km², is a relatively spread-out city. Hong Kong is dramatically more crowded, with 4.6x the population density.
Density Gap
Hong Kong is 4.6x more densely populated
Hong Kong covers 1,114 km². Cities with a similar urban footprint include Lagos (1,172 km²), San Antonio (1,209 km²), Rio de Janeiro (1,221 km²), Dallas (997 km²), or Abu Dhabi (972 km²).
San Diego covers 964 km². Cities with a similar urban footprint include Abu Dhabi (972 km²), Dallas (997 km²), Berlin (892 km²), Santiago (838 km²), or Hong Kong (1,114 km²).
The straight-line distance from Hong Kong to San Diego is 11,823 km (7,346 miles), with an estimated flight time of ~14h 25m.
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