Denver
401 km²
Lisbon
100 km²
United States
Portugal
Area Comparison
Denver is 4.0x larger than Lisbon
Population Comparison
Denver has 1.3x more people than Lisbon
Denver is significantly larger, covering 4.0 times the area of Lisbon. Denver spans 401 km² (155 mi²) while Lisbon covers 100 km² (39 mi²) — a difference of 301 km². You could fit Lisbon inside Denver approximately 4 times.
To put Denver's size in perspective, its area of 401 km² is about 1.5x smaller than Seoul. Meanwhile, Lisbon at 100 km² is roughly the same size as Paris (city proper).
In more relatable units, Denver's 401 km² is about 56,000 American football fields, 200 times the area of Monaco, or 120 times the area of Central Park. For Lisbon, that's about 14,000 American football fields, 50 times the area of Monaco, or 29 times the area of Central Park.
Denver is the capital and most populous city of the U.S. state of Colorado. Officially a consolidated city and county, it is located in the South Platte River valley on the western edge of the High Plains, and is just east of the Front Range of the Rocky Mountains (Rockies). Denver is the 19th-most populous city in the United States and the fifth-most populous state capital, with a population of 715,522 at the 2020 census.
Known as "Mile High City", Denver covers 401 km² with a population of 0.7 million. The city was established in 1858. Denver is known for Red Rocks Amphitheatre, Denver Art Museum, Union Station, among other attractions.
Denver sits in the South Platte River valley just east of the Rocky Mountains' Front Range.
Lisbon is the capital and most populous city of Portugal, with an estimated population of 575,739 as of 2024, within its administrative limits and 3,028,000 within the metropolis, as of 2025. Lisbon is mainland Europe's westernmost capital city, and the only one along the Atlantic coast, the others being on islands. The city lies in the western portion of the Iberian Peninsula, on the northern shore of the River Tagus.
Often called "City of Seven Hills", Lisbon has an area of 100 km² and is home to 0.6 million people. The city dates back to 1200 BC. Visitors come for Belém Tower, Jerónimos Monastery, Tram 28, and much more. Getting around is easy with the Lisbon Metro.
Lisbon is mainland Europe's westernmost capital city and the only European capital along the Atlantic coast.
Denver has a population density of 1,796 people per km² — a relatively spread-out city. Lisbon, with 5,500 people per km², is a densely populated city. Lisbon is dramatically more crowded, with 3.1x the population density.
Denver has a cold semi-arid climate climate while Lisbon experiences Mediterranean conditions.
Size Ratio
Lisbon fits inside Denver ~4 times
Density Gap
Lisbon is 3.1x more densely populated
History
Lisbon is ~3,058 years older
Denver covers 401 km². Cities with a similar urban footprint include Vienna (415 km²), Portland (376 km²), Philadelphia (370 km²), Seattle (369 km²), or Dhaka (368 km²).
Lisbon covers 100 km². Cities with a similar urban footprint include Barcelona (101 km²), Paris (105 km²), Copenhagen (91 km²), Zurich (88 km²), or Vancouver (115 km²).
The straight-line distance from Denver to Lisbon is 7,806 km (4,850 miles), with an estimated flight time of ~9h 41m.
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