| Round Valley | |
| Settlement Type: | Former settlement |
| Pushpin Map: | California |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location in California |
| Unit Pref: | US |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Plumas County |
| Coordinates: | 40.1158°N -120.9678°W |
| Elevation M: | 1378 |
| Elevation Ft: | 4521 |
Round Valley is a former settlement in Plumas County, California, at an elevation of 4521 feet (1378 m). Round Valley is located northwest of the Round Valley Reservoir, 3miles south of Greenville, and 3.5miles west-northwest of Crescent Mills.
The Round Valley post office opened in 1863, closed for a time in 1870, and closed finally in 1873.