Rome
1,285 km²
San Diego
964 km²
Italy
United States
Area Comparison
Rome is 1.3x larger than San Diego
Population Comparison
Rome has 2.1x more people than San Diego
In terms of area, Rome is 1.3x the size of San Diego. Rome spans 1,285 km² (496 mi²) while San Diego covers 964 km² (372 mi²) — a difference of 321 km².
To put Rome's size in perspective, its area of 1,285 km² is about 1.2x smaller than London. Meanwhile, San Diego at 964 km² is roughly the same size as Berlin.
Picture Rome another way: its area is large enough to fit about 180,000 American football fields, 22 times the area of Manhattan, or 12 times the area of Paris. San Diego works out to about 135,000 American football fields, 16 times the area of Manhattan, or 9 times the area of Paris.
Rome is the capital city and most populated comune (municipality) of Italy. It is also the administrative centre of the Lazio region and of the Metropolitan City of Rome. A special comune named Roma Capitale with a population of 2.7 million in an area of 1,287.36 km2 (497.1 mi2), Rome is the third most populous city in the European Union by population within city limits. The Metropolitan City of Rome Capital, with a population of 4.2 million, is the most populous metropolitan city in Italy.
Known as "The Eternal City", Rome covers 1,285 km² with a population of 2.9 million. The city was founded around 753 BC. Rome is known for Colosseum, Vatican City, Trevi Fountain, among other attractions. The city's main transit system is the Rome Metro.
Rome's special comune Roma Capitale spans 1,287 km2, making it the third most populous city in the EU within city limits
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.
Nicknamed "America's Finest City", San Diego has an area of 964 km² and is home to 1.4 million people. Its history stretches 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.
Rome has a population density of 2,233 people per km² — a moderately dense city. San Diego, with 1,442 people per km², is a relatively spread-out city. Rome is noticeably denser, packing 1.5 times more people per square kilometer.
Density Gap
Rome is 1.5x more densely populated
History
Rome is ~2,522 years older
Rome covers 1,285 km². Cities with a similar urban footprint include Los Angeles (1,302 km²), Phoenix (1,341 km²), Rio de Janeiro (1,221 km²), San Antonio (1,209 km²), or Lagos (1,172 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 Rome to San Diego is 10,254 km (6,372 miles), with an estimated flight time of ~12h 34m.
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