About Koga
Koga is a city located in Japan, in the Ibaraki Prefecture region. According to the latest available data (2026), the population of Koga is approximately 138,237 residents, making it the #247 most populous city in Japan.
Globally, Koga ranks #12,064 among the world's most populated cities.
Koga City Statistics
| City | Koga |
| Country |  Japan |
| Population | 138,237 |
| Global Rank | #12,064 |
| Rank in Japan | #247 of 360 cities |
| City Category | city |
| Region | Ibaraki Prefecture |
| Latitude | 36.1783 |
| Longitude | 139.7554 |
| Data Year | 2026 |
Where is Koga Located?
Koga is located in Japan, in the Ibaraki Prefecture region, at coordinates 36.1783° latitude and 139.7554° longitude. Koga sits in the subtropics, typically enjoying warm temperatures year-round.
Nearby Cities
Other Cities in Japan
Largest Cities in Japan
| # | City | Population |
|---|---|---|
| 2 | Yokohama | 3,757,630 |
| 3 | Nagoya | 2,326,844 |
| 6 | Sapporo | 1,959,313 |
| 7 | Fukuoka | 1,603,043 |
| 8 | Kawasaki | 1,539,522 |
Frequently Asked Questions
What is the population of Koga?
The population of Koga is approximately 138,237 residents according to the latest available data (2026).
Where is Koga located?
Koga is located in Japan at approximately 36.1783° latitude and 139.7554° longitude.
Is Koga one of the largest cities in Japan?
With a population of 138,237, Koga is one of the notable urban areas in Japan. It ranks #247 out of 360 cities in the country.
