Population Of Okaya
The population of Okaya, as estimated in late 2010, is 54,286.
Regions of Japan 
- Aichi
- Akita
- Aomori
- Chiba
- Ehime
- Fukui
- Fukuoka
- Fukushima
- Gifu
- Gumma
- Hiroshima
- Hokkaidō
- Hyōgo
- Ibaraki
- Ishikawa
- Iwate
- Kagawa
- Kagoshima
- Kanagawa
- Kōchi
- Kumamoto
- Kyōto
- Mie
- Miyagi
- Miyazaki
- Nagano
- Nagasaki
- Nara
- Niigata
- Ōita
- Okayama
- Okinawa
- Ōsaka
- Saga
- Saitama
- Shiga
- Shimane
- Shizuoka
- Tochigi
- Tokushima
- Tōkyō
- Tottori
- Toyama
- Wakayama
- Yamagata
- Yamaguchi
- Yamanashi