| Official Name: | Cottage Grove, Illinois |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Illinois#USA |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Saline |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 430 |
| Coordinates: | 37.7481°N -88.4106°W |
| Area Code: | 618 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 422582 |
Cottage Grove is an unincorporated community in Cottage Township, Saline County, Illinois, United States.[1] Cottage Grove is 4miles west-northwest of Equality.
Cottage Grove Cemetery sits across the road from the old Cottage Grove school. The community sits to the east of Southeastern Illinois College.