| Official Name: | Walnut Grove, Illinois |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Illinois |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Putnam |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 456 |
| Coordinates: | 41.1767°N -89.3608°W |
| Area Code: | 309 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 1719783[1] |
Walnut Grove is an unincorporated community in Putnam County, Illinois, United States, located on the western shore of Senachwine Lake.