| Official Name: | Warner Valley |
| Settlement Type: | census-designated place |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Plumas |
| Population Total: | 8 |
| Population As Of: | 2020 |
| Population Footnotes: | [1] |
| Population Density Km2: | auto |
| Unit Pref: | US |
| Area Footnotes: | [2] |
| Area Total Sq Mi: | 17.526 |
| Area Land Sq Mi: | 17.497 |
| Area Water Sq Mi: | 0.029 |
| Area Total Km2: | 45.392 |
| Area Land Km2: | 45.317 |
| Area Water Km2: | 0.075 |
| Area Water Percent: | 0.17 |
| Timezone: | Pacific (PST) |
| Utc Offset: | -8 |
| Timezone Dst: | PDT |
| Utc Offset Dst: | -7 |
| Elevation Ft: | 6509 |
| Pushpin Map: | California |
| Pushpin Map Caption: | Position in California. |
| Coordinates: | 39.78°N -120.5411°W |
| Postal Code Type: | ZIP Code |
| Blank Name: | GNIS feature ID |
| Blank Info: | 2583182 |
Warner Valley is a census-designated place in Plumas County, California. Warner Valley sits at an elevation of 5341feet. The 2010 United States census reported Warner Valley's population was 2.
According to the United States Census Bureau, the CDP covers an area of 17.5 square miles (45.4 km), 99.83% of it land and 0.17% of it water.
The 2010 United States Census reported that Warner Valley had a population of 2. The racial makeup of Warner Valley was 2 (100.0%) White. Hispanic or Latino of any race were 0 persons (0.0%).