| Plainsburg | |
| 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: | Merced County |
| Coordinates: | 37.2331°N -120.3244°W |
| Elevation M: | 67 |
| Elevation Ft: | 220 |
Plainsburg (formerly, Plainsberg and Welch's Store) is an unincorporated community in Merced County, California. It is located 4miles west of Le Grand, at an elevation of 220 feet (67 m).
Plainsburg was said to be a thriving farming center in the nineteenth century. It had several businesses and was legally incorporated for a time. The town declined when it was bypassed by the Southern Pacific Railroad to the west and later the Santa Fe Railroad to the east. A grocery store remained as of 1992; the cemetery and elementary school are still present today.[1]
A post office operated at Plainsburg from 1869 to 1907.