Brisbane
15,826 km²
San Diego
964 km²
Australia
United States
Area Comparison
Brisbane is 16.4x larger than San Diego
Population Comparison
Brisbane has 1.9x more people than San Diego
Yes — Brisbane is 16.4x larger than San Diego by area. Brisbane spans 15,826 km² (6,110 mi²) while San Diego covers 964 km² (372 mi²) — a difference of 14,862 km². You could fit San Diego inside Brisbane approximately 16 times.
To put Brisbane's size in perspective, its area of 15,826 km² is about 2.5x the size of Shanghai. Meanwhile, San Diego at 964 km² is roughly the same size as Berlin.
Picture Brisbane another way: its area is large enough to fit about 2,200,000 American football fields, 150 times the area of Paris, or 130 times the area of San Francisco. San Diego works out to about 135,000 American football fields, 16 times the area of Manhattan, or 9 times the area of Paris.
Brisbane is the capital and largest city of the Australian state of Queensland and the third-most populous city in Australia, with a population of approximately 2.8 million. Brisbane lies at the centre of South East Queensland, a bio-geographical and urban region with an estimated population of 4.1 million as of 2024. The central business district is situated within a peninsula of the Brisbane River approximately 15 kilometres (9.3 mi) from its mouth at Moreton Bay.
Known as "Brissy", Brisbane covers 15,826 km² with a population of 2.7 million. The city was established in 1824. Brisbane is known for Brisbane River, South Bank Parklands, Story Bridge, among other attractions.
Brisbane is Queensland's capital and Australia's third-most populous city with around 2.8 million residents.
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.
Also known as "America's Finest City", San Diego has an area of 964 km² and is home to 1.4 million people. The city dates back to 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.
Brisbane has a population density of 171 people per km² — a low-density, sprawling urban area. San Diego, with 1,442 people per km², is a relatively spread-out city. San Diego is dramatically more crowded, with 8.4x the population density.
Size Ratio
San Diego fits inside Brisbane ~16 times
Density Gap
San Diego is 8.4x more densely populated
Brisbane covers 15,826 km². Cities with a similar urban footprint include Beijing (16,411 km²), Hangzhou (16,854 km²), Chengdu (14,378 km²), Sydney (12,368 km²), or Xi'an (10,097 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 Brisbane to San Diego is 11,596 km (7,206 miles), with an estimated flight time of ~14h 9m.
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