| Longvale | |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | California#USA |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location in California |
| Pushpin Image: | California Locator Map with US.PNG |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Name1: | California |
| Subdivision Type2: | County |
| Subdivision Name2: | Mendocino County |
| Coordinates: | 39.5553°N -123.4297°W |
| Elevation M: | 363 |
| Elevation Ft: | 1191 |
Longvale is an unincorporated community in Mendocino County, California. It is located on Outlet Creek adjacent to the Northwestern Pacific Railroad and U.S. Route 101[1] 9.5miles south-southeast of Laytonville, at an elevation of 1191 feet (363 m).
A post office operated at Longvale from 1911 to 1958. The post office was located in a store on the original alignment of US 101 across from Camp Piercy, near a bridge to Andersonia. The area was primarily an "auto camp" for tourists driving through the Redwood Empire on US 101.[2]