| Official Name: | Casner, Illinois |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Illinois#USA |
| Pushpin Label: | Casner |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Macon |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 705 |
| Coordinates: | 39.8003°N -88.7911°W |
| Area Code: | 217 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 405685 |
Casner is an unincorporated community in Long Creek Township, Macon County, Illinois, United States. The community is on U.S. Route 36 east-southeast of Long Creek.[1]