| Waga River | |
|---|---|
 Aerial view of the Waga River with Ishibane Dam in the center and Yuda Dam and Lake Kinshu visible in the distance | |
  Location of the mouth in Japan  Waga River (Japan) | |
| Native name | |
| Location | |
| Country | Japan |
| Physical characteristics | |
| Source | |
| • location | Mount Waga, Ōu Mountains, Iwate |
| • elevation | 1,200 m (3,900 ft) |
| Mouth | Kitakami, Iwate |
• location | Kitakami River |
• coordinates | 39°16′15″N 141°07′24″E / 39.27083°N 141.12333°E |
• elevation | 52 m (171 ft) |
| Length | 75.3 km (46.8 mi) |
| Basin size | 952 km2 (368 sq mi) |
The Waga River (和賀川, Waga-gawa) is a river in Iwate Prefecture, Japan. From its headwaters near Mt. Waga in the Ōu Mountains it flows from north to south through the entire length of Nishiwaga Town before turning east through Kitakami City. The River enters the Kitakami River on the south side of the city opposite Mt. Otoko.
The headwaters of both the Waga River and its major tributary the Geto River (夏油川, Geto-gawa) are located in geologically active areas that provide hot springs for numerous onsen. Located at the head of the Geto River is Geto Onsen and Geto Ski Area, both popular attractions.