Kusatsu may refer to:
- Kusatsu, Shiga, a city in western Japan
- Kusatsu Line, operated by JR West
- MIO Biwako Kusatsu, local football club
- Kusatsu, Gunma, a town in eastern Japan
- Kusatsu (train), operated by JR East
- Thespakusatsu Gunma, local football club
- Kusatsu Onsen, a hot spring resort in Gunma Prefecture, Japan
- Clyde Kusatsu, Japanese American actor
See also
- Kusatsu Station (disambiguation)
- Mount Kusatsu-Shirane, active stratovolcano in Kusatsu, Gunma, Japan