| Bear River | |
| Map Size: | 300 |
| Pushpin Map: | USA Washington |
| Pushpin Map Size: | 300 |
| Pushpin Map Caption: | Location of the mouth of the Bear River in Washington |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Washington |
| Subdivision Type4: | County |
| Subdivision Name4: | Pacific |
| Source1: | Bear Branch |
| Source1 Location: | Bear River Ridge |
| Source1 Coordinates: | 46.2811°N -123.8786°W |
| Mouth Location: | Willapa Bay |
| Mouth Coordinates: | 46.3722°N -123.9531°W |
| Mouth Elevation: | 0feet |
The Bear River is a river in the U.S. state of Washington. Its upper reach is known as Bear Branch.
The Bear River, or Bear Branch, originates just north of the mouth of the Columbia River in the Bear River Range and Willapa Hills. It flows generally north and west, emptying into the southern end of Willapa Bay.