Iwatsuki Population 2026
Iwatsuki has a population of 108,833, making it the #253 biggest city in 🇯🇵 Japan, located in Saitama. Roughly 0.1% of Japan's population lives here. It is about 89× smaller than Tokyo, the country's biggest city.
Population (city proper)
108,833
Rank in Japan
#253
Coordinates
35.96°N, 139.70°E
~9 m elevation · Asia/Tokyo
Distance to capital (Tokyo)
31 km
19 miles, straight line
Other big cities in Saitama
Cities near Iwatsuki
FAQ
What is the population of Iwatsuki?
Iwatsuki has a population of 108,833 (city proper, latest official figure via GeoNames), making it the #253 biggest city in Japan.
What region is Iwatsuki in?
Iwatsuki is located in Saitama, Japan.
Is Iwatsuki the capital of Japan?
No, the capital of Japan is Tokyo, about 31 km away.
Sources & notes
Population refers to the city proper (municipal boundaries), not the metropolitan area. Source: GeoNames (CC BY 4.0), retrieved 2026-07-07. Country data: UN World Population Prospects 2024.