| Sly Park | |
| 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: | El Dorado County |
| Coordinates: | 38.7214°N -120.5847°W |
| Elevation M: | 1085 |
| Elevation Ft: | 3560 |
| Population As Of: | 2010 |
| Population Total: | 459 |
Sly Park is an unincorporated community in El Dorado County, California. It is located in Sly Valley 13miles east of Placerville, at an elevation of 3560 feet (1085 m).
A post office operated at Sly Park from 1891 to 1919, with several moves. The name honors James Sly, one of the Mormons who discovered Sly Valley.