Hanoi
3,359 km²
Phoenix
1,341 km²
Vietnam
United States
Area Comparison
Hanoi is 2.5x larger than Phoenix
Population Comparison
Hanoi has 5.0x more people than Phoenix
Yes — Hanoi is 2.5x larger than Phoenix by area. Hanoi spans 3,359 km² (1,297 mi²) while Phoenix covers 1,341 km² (518 mi²) — a difference of 2,018 km². You could fit Phoenix inside Hanoi approximately 2 times.
To put Hanoi's size in perspective, its area of 3,359 km² is about 1.2x smaller than Rhode Island. Meanwhile, Phoenix at 1,341 km² is about 1.2x smaller than London.
Picture Hanoi another way: its area is large enough to fit about 470,000 American football fields, 57 times the area of Manhattan, or 32 times the area of Paris. Phoenix, by comparison, equals about 188,000 American football fields, 23 times the area of Manhattan, or 13 times the area of Paris.
Hanoi is the capital and second-most populous municipality of Vietnam. It encompasses an area of 3,358.6 km2 (1,296.8 mi2), and as of 2025 has a population of 8,807,523. Hanoi had the second-highest gross regional domestic product of all Vietnamese provinces and municipalities at US$48 billion in 2023, behind Ho Chi Minh City. It hosts 78 foreign embassies, the headquarters of the Vietnam People's Army (VPA), its Vietnam National University system, and other governmental organizations.
Known as "City Between Rivers", Hanoi covers 3,359 km² with a population of 8.1 million. The city was established in 1010. Hanoi is known for Hoan Kiem Lake, Old Quarter, Temple of Literature, among other attractions. The city's main transit system is the Hanoi Metro.
Hanoi encompasses 3,358.6 square kilometers and had a population of nearly 8.8 million as of 2025.
Phoenix is the capital and most populous city of the U.S. state of Arizona. With over 1.6 million residents at the 2020 census, Phoenix is the fifth-most populous city in the United States and the most populous state capital. The Phoenix metropolitan area, with an estimated 5.19 million residents, is the tenth-most populous metropolitan area in the U.S. and the most populous in the Mountain states and Southwest.
Nicknamed "Valley of the Sun", Phoenix has an area of 1,341 km² and is home to 1.6 million people. It was established in 1868. Visitors come for Camelback Mountain, Desert Botanical Garden, Heard Museum, and much more.
Phoenix is the most populous U.S. state capital and the fifth-largest city in the country with 1.6 million residents.
Hanoi has a population density of 2,397 people per km² — a moderately dense city. Phoenix, with 1,201 people per km², is a relatively spread-out city. Hanoi is noticeably denser, packing 2.0 times more people per square kilometer.
Size Ratio
Phoenix fits inside Hanoi ~2 times
Density Gap
Hanoi is 2.0x more densely populated
History
Hanoi is ~858 years older
Hanoi covers 3,359 km². Cities with a similar urban footprint include Karachi (3,527 km²), Cairo (3,085 km²), Dubai (4,114 km²), Lima (2,672 km²), or Moscow (2,511 km²).
Phoenix covers 1,341 km². Cities with a similar urban footprint include Los Angeles (1,302 km²), Rome (1,285 km²), Rio de Janeiro (1,221 km²), Delhi (1,484 km²), or Mexico City (1,485 km²).
The straight-line distance from Hanoi to Phoenix is 12,746 km (7,920 miles), with an estimated flight time of ~15h 30m.
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