Boston
232 km²
San Diego
964 km²
USA
United States
Area Comparison
Boston is 4.2x smaller than San Diego
Population Comparison
Boston has 2.0x fewer people than San Diego
San Diego is significantly larger, covering 4.2 times the area of Boston. San Diego spans 964 km² (372 mi²) while Boston covers 232 km² (90 mi²) — a difference of 732 km². You could fit Boston inside San Diego approximately 4 times.
To put Boston's size in perspective, its area of 232 km² is roughly the same size as Amsterdam. Meanwhile, San Diego at 964 km² is roughly the same size as Berlin.
In more relatable units, Boston's 232 km² is about 32,000 American football fields, 110 times the area of Monaco, or 68 times the area of Central Park. San Diego, by comparison, equals about 135,000 American football fields, 16 times the area of Manhattan, or 9 times the area of Paris.
Boston is the capital and most populous city of the U.S. state of Massachusetts. It serves as a cultural and financial center of New England, a region of the Northeastern United States. Boston has an area of 48.4 sq mi (125 km2) and a population of 675,647 as of the 2020 census, making it the third-most populous city in the Northeastern United States after New York City and Philadelphia.
Known as "Beantown", Boston covers 232 km² with a population of 0.7 million. The city was established in 1630. Boston is known for Fenway Park, Freedom Trail, Harvard University, among other attractions. The city's main transit system is the MBTA (The T).
Boston covers just 125 km2 yet serves as the cultural and financial heart of all New England
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. 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.
Boston has a population density of 2,931 people per km² — a moderately dense city. San Diego, with 1,442 people per km², is a relatively spread-out city. Boston is noticeably denser, packing 2.0 times more people per square kilometer.
Size Ratio
Boston fits inside San Diego ~4 times
Density Gap
Boston is 2.0x more densely populated
History
Boston is ~139 years older
Boston covers 232 km². Cities with a similar urban footprint include Osaka (225 km²), Kuala Lumpur (243 km²), Amsterdam (219 km²), Helsinki (214 km²), or Edinburgh (259 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 Boston to San Diego is 4,150 km (2,579 miles), with an estimated flight time of ~5h 23m.
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