| Official Name: | Walnut Prairie, 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: | Clark |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 482 |
| Coordinates: | 39.24°N -87.6661°W |
| Area Code: | 217 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 420478 |
Walnut Prairie is an unincorporated community in Clark County, Illinois, United States, located along Illinois Route 1, 11miles south of Marshall.
Walter E. Cork (1886 - 1958), an Illinois state representative and businessman, was born in Walnut Prairie.[1]