| Santa Margarita Formation | |
| Type: | Formation |
| Age: | Neogene |
| Period: | Neogene |
| Region: | San Joaquin Valley, California |
| Country: | United States |
| Underlies: | Chanac Formation |
The Santa Margarita Formation is a Neogene Period geologic formation in the San Joaquin Valley of central California.
It preserves fossils dating back to the Miocene epoch.