Sanmu Population 2026

Sanmu has a population of 48,444, making it the #574 biggest city in 🇯🇵 Japan, located in Chiba. It is about 201× smaller than Tokyo, the country's biggest city.

Location of Sanmu (capital Tokyo shown for reference). Boundaries: Natural Earth.

Population (city proper)

48,444

Rank in Japan

#574

Coordinates

35.63°N, 140.42°E

~52 m elevation · Asia/Tokyo

Distance to capital (Tokyo)

66 km

41 miles, straight line

Other big cities in Chiba

City	Population	Rank in Japan
Chiba	979,768	#13
Matsudo	498,575	#31
Kashiwa	433,436	#41
Ichihara	283,531	#83
Nagareyama	200,136	#119
Yachiyo	199,498	#120
Narashino	176,197	#138
Sakura	173,740	#141

Cities near Sanmu

Narutō25,696 people · ~3 km away
Yokoshiba22,075 people · ~6 km away
Yachimata68,769 people · ~9 km away
Tōgane66,332 people · ~10 km away
Ryōgoku49,735 people · ~11 km away
Ōamishirasato48,129 people · ~14 km away

FAQ

What is the population of Sanmu?

Sanmu has a population of 48,444 (city proper, latest official figure via GeoNames), making it the #574 biggest city in Japan.

What region is Sanmu in?

Sanmu is located in Chiba, Japan.

Is Sanmu the capital of Japan?

No, the capital of Japan is Tokyo, about 66 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.

← All biggest cities in Japan · Japan population by year