Denver
401 km²
Johannesburg
1,644 km²
United States
South Africa
Area Comparison
Denver is 4.1x smaller than Johannesburg
Population Comparison
Denver has 6.7x fewer people than Johannesburg
In terms of area, Johannesburg is 4.1x the size of Denver. Johannesburg spans 1,644 km² (635 mi²) while Denver covers 401 km² (155 mi²) — a difference of 1,243 km². You could fit Denver inside Johannesburg approximately 4 times.
To put Denver's size in perspective, its area of 401 km² is about 1.5x smaller than Seoul. Meanwhile, Johannesburg at 1,644 km² is roughly the same size as London.
Denver's footprint is roughly about 56,000 American football fields, 200 times the area of Monaco, or 120 times the area of Central Park — pick whichever unit feels intuitive. Johannesburg works out to about 230,000 American football fields, 28 times the area of Manhattan, or 16 times the area of Paris.
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.
Johannesburg, colloquially known as Jozi, Joburg or "The City of Gold", is the most populous city in South Africa. The City of Johannesburg itself has a population of 5,538,596, while the City of Johannesburg Metropolitan Municipality has a population of 6,599,190, making it one of the 100 largest urban areas in the world. Johannesburg is the provincial capital of Gauteng, the wealthiest province in South Africa, and seat of the country's highest court, the Constitutional Court.
Nicknamed "Jozi", Johannesburg has an area of 1,644 km² and is home to 4.8 million people. It was established in 1886. Visitors come for Apartheid Museum, Soweto township, Constitutional Court, and much more.
Johannesburg ranks among the world's 100 largest urban areas, with a metro population of about 6.6 million.
Denver has a population density of 1,796 people per km² — a relatively spread-out city. Johannesburg, with 2,920 people per km², is a moderately dense city. Johannesburg is noticeably denser, packing 1.6 times more people per square kilometer.
Size Ratio
Denver fits inside Johannesburg ~4 times
Density Gap
Johannesburg is 1.6x more densely populated
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).
Johannesburg covers 1,644 km². Cities with a similar urban footprint include Bogotá (1,578 km²), London (1,572 km²), Bangkok (1,569 km²), Houston (1,725 km²), or São Paulo (1,521 km²).
The straight-line distance from Denver to Johannesburg is 15,441 km (9,595 miles), with an estimated flight time of ~18h 40m.
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