| Official Name: | Sylvan, Illinois |
| Settlement Type: | Former settlement |
| Pushpin Map: | Illinois |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Cass |
| Elevation Ft: | 607 |
| Coordinates: | 39.985°N -90.0711°W |
| Blank Name: | GNIS feature ID |
| Blank Info: | 423227 |
Sylvan is a former settlement in Panther Creek Township, Cass County, Illinois, United States. Sylvan was southwest of Newmansville.
The town was populated during the mid-19th century by mostly Irish immigrants. Currently, there is one cemetery there. Sylvan is located near Jim Edgar Park.
A photo of this ghost town was briefly shown in the horror movie Silent Hill. In the film, the town was misspelled as "Sylvane".