Barcelona
101 km²
San Diego
964 km²
Spain
United States
Area Comparison
Barcelona is 9.5x smaller than San Diego
Population Comparison
Barcelona has 1.2x more people than San Diego
San Diego is significantly larger, covering 9.5 times the area of Barcelona. San Diego spans 964 km² (372 mi²) while Barcelona covers 101 km² (39 mi²) — a difference of 863 km². You could fit Barcelona inside San Diego approximately 9 times.
To put Barcelona's size in perspective, its area of 101 km² is roughly the same size as Paris (city proper). Meanwhile, San Diego at 964 km² is roughly the same size as Berlin.
In more relatable units, Barcelona's 101 km² is about 14,000 American football fields, 50 times the area of Monaco, or 30 times the area of Central Park. For San Diego, that's about 135,000 American football fields, 16 times the area of Manhattan, or 9 times the area of Paris.
Barcelona is a city on the northeastern coast of Spain. It is the capital and largest city of the autonomous community of Catalonia, as well as the second-most populous municipality of Spain. With a population of 1.7 million within city limits, its urban area extends to numerous neighbouring municipalities within the province of Barcelona and is home to around 5.7 million people, making it the fifth most populous urban area of the European Union after Paris, the Ruhr area, Madrid and Milan.
Known as "Ciutat Comtal", Barcelona covers 101 km² with a population of 1.7 million. The city was founded around 230 BC. Barcelona is known for Sagrada Familia, Park Güell, La Rambla, among other attractions. The city's main transit system is the Barcelona Metro (TMB).
Barcelona is the second-most populous municipality in Spain and the capital of the autonomous community of Catalonia.
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. 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.
Barcelona has a population density of 16,436 people per km² — an extremely dense urban environment. San Diego, with 1,442 people per km², is a relatively spread-out city. Barcelona is dramatically more crowded, with 11.4x the population density.
Size Ratio
Barcelona fits inside San Diego ~9 times
Density Gap
Barcelona is 11.4x more densely populated
History
Barcelona is ~1,999 years older
Barcelona covers 101 km². Cities with a similar urban footprint include Lisbon (100 km²), Paris (105 km²), Copenhagen (91 km²), Vancouver (115 km²), or Zurich (88 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 Barcelona to San Diego is 9,701 km (6,028 miles), with an estimated flight time of ~11h 55m.
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