| Whitewater River | |
| Name Other: | Whitewater Creek |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Kansas |
| Length: | 62miles, South |
| Source1 Location: | Southern Marion County, Kansas, United States |
| Source1 Coordinates: | 38.1153°N -97.0894°W[1] |
| Source1 Elevation: | 1184feet |
| Mouth: | Walnut River |
| Mouth Location: | Near Augusta, Kansas, United States |
| Mouth Coordinates: | 37.6569°N -96.9917°W |
| Mouth Elevation: | 361feet |
| River System: | Walnut River |
The Whitewater River is a 62adj=midNaNadj=mid[2] tributary of the Walnut River in southern Kansas in the United States. Via the Walnut and Arkansas Rivers, it is part of the watershed of the Mississippi River.
According to the Geographic Names Information System, the stream has also been known as Whitewater Creek.
The Whitewater River rises in southern Marion County (southeast of Peabody) and flows southwardly into Butler County, past the towns of Potwin and Towanda, then joins the Walnut River at Augusta.
In Butler County, the river collects the West Branch Whitewater River, which rises in Harvey County and flows southeastwardly past Whitewater; and the East Branch Whitewater River, which rises near Burns in Marion County and flows southwestwardly.