Barcelona
101 km²
Lagos
1,172 km²
Spain
Nigeria
Area Comparison
Barcelona is 11.6x smaller than Lagos
Population Comparison
Barcelona has 9.3x fewer people than Lagos
Lagos is significantly larger, covering 11.6 times the area of Barcelona. Lagos spans 1,172 km² (453 mi²) while Barcelona covers 101 km² (39 mi²) — a difference of 1,071 km². You could fit Barcelona inside Lagos approximately 11 times.
To put Barcelona's size in perspective, its area of 101 km² is roughly the same size as Paris (city proper). Meanwhile, Lagos at 1,172 km² is about 1.3x the size of Berlin.
Barcelona's footprint is roughly about 14,000 American football fields, 50 times the area of Monaco, or 30 times the area of Central Park — pick whichever unit feels intuitive. Lagos, by comparison, equals about 164,000 American football fields, 20 times the area of Manhattan, or 11 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.
Lagos, or Lagos City, is a large metropolitan port city in southwestern Nigeria. As of November 2025, the size of the city's population has been estimated to be between 17 and 21 million residents, making Lagos the largest city in Nigeria, the most populous urban area on the African continent, and one of the fastest-growing megacities in the world.
Often called "Lasgidi", Lagos has an area of 1,172 km² and is home to 15.4 million people. Its history stretches back to 1472. Visitors come for Victoria Island, Lekki Conservation Centre, Nike Art Gallery, and much more. Getting around is easy with the Lagos Rail (Blue & Red Lines).
Lagos is the most populous urban area on the African continent, with an estimated 17 to 21 million residents as of 2025.
Looking beyond city limits, the Lagos metropolitan area covers 2,706 km², which is 3.4x larger than greater Barcelona at 803 km². The Lagos metro area is also more populous, with 21.0 million people compared to 5.6 million.
Barcelona has a population density of 16,436 people per km² — an extremely dense urban environment. Lagos, with 13,131 people per km², is an extremely dense urban environment. Both cities have comparable density, though Barcelona is slightly more compact.
This comparison spans continents — Barcelona in Europe versus Lagos in Africa. Despite the geographic distance, comparing their sizes reveals surprising insights about how cities grow worldwide.
Barcelona has a Mediterranean climate while Lagos experiences tropical savanna conditions. Winters differ dramatically: Lagos stays around 27°C while Barcelona drops to 10°C.
Size Ratio
Barcelona fits inside Lagos ~11 times
History
Barcelona is ~1,702 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).
Lagos covers 1,172 km². Cities with a similar urban footprint include San Antonio (1,209 km²), Rio de Janeiro (1,221 km²), Hong Kong (1,114 km²), Rome (1,285 km²), or Los Angeles (1,302 km²).
The straight-line distance from Barcelona to Lagos is 3,878 km (2,410 miles), with an estimated flight time of ~5h 4m.
Want to explore more? Compare city sizes for any two cities worldwide, or share your location live with friends.