Australia
UK
Area Comparison
Sydney is 7.9x larger than London
Population Comparison
Sydney has 1.7x fewer people than London
Yes — Sydney is 7.9x larger than London by area. Sydney spans 12,368 km² (4,775 mi²) while London covers 1,572 km² (607 mi²) — a difference of 10,796 km². You could fit London inside Sydney approximately 7 times.
To put Sydney's size in perspective, its area of 12,368 km² is about 2.0x the size of Shanghai. Meanwhile, London at 1,572 km² is about 1.4x smaller than Tokyo (city proper).
Australia's largest city, known for the Opera House. Known as "The Harbour City", Sydney covers 12,368 km² with a population of 5.3 million. The city was established in 1788. Sydney is known for Sydney Opera House, Harbour Bridge, Bondi Beach, among other attractions. The city's main transit system is the Sydney Trains.
Sydney's administrative area is so large it stretches from the coast to the Blue Mountains foothills
Capital of England and the United Kingdom. Often called "The Big Smoke", London has an area of 1,572 km² and is home to 9.0 million people. It was established in 43. Visitors come for Big Ben, Tower of London, Buckingham Palace, and much more. Getting around is easy with the London Underground.
London was the first city to have an underground railway, opening in 1863
Looking beyond city limits, the Sydney metropolitan area covers 12,368 km², which is 1.5x larger than greater London at 8,382 km². The London metro area is also more populous, with 14.3 million people compared to 5.3 million.
Sydney has a population density of 429 people per km² — a low-density, sprawling urban area. London, with 5,712 people per km², is a densely populated city. London is dramatically more crowded, with 13.3x the population density.
This comparison spans continents — Sydney in Oceania versus London in Europe. Despite the geographic distance, comparing their sizes reveals surprising insights about how cities grow worldwide.
Sydney has a humid subtropical climate while London experiences oceanic conditions. When it's noon in Sydney, it's 2:00 AM in London — a 10-hour time difference.
Size Ratio
London fits inside Sydney ~7 times
Density Gap
London is 13.3x more densely populated
Time Difference
10 hours apart
History
London is ~1,745 years older
Want to explore more? Compare city sizes for any two cities worldwide.