Tamagawa (玉川?) may refer to the following places in Japan:
- Tamagawa, Ehime, a former town in Ehime Prefecture that is now part of the city of Imabari
- Tamakawa, Fukushima, a village in Fukushima Prefecture
- Tamagawa, Saitama, a village in Saitama Prefecture
- Tamagawa, Yamaguchi, a town in Yamaguchi Prefecture
- Tama River (in Japanese, 多摩川 Tamagawa) in and near Tokyo
- Tamagawa, Akita, location of Japan's highest flow rate hot spring, the Tamagawa Hot Springs, in Akita Prefecture