| Official Name: | Castleton, 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: | Stark |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 787 |
| Coordinates: | 41.1178°N -89.7061°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 61426 |
| Area Code: | 309 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 405694 |
Castleton is an unincorporated community in Stark County, Illinois, United States, located 5miles northeast of Wyoming. Castleton has a post office with ZIP code 61426.[1]
Castleton was named for Dr. Alfred Castle, who was instrumental in introducing a railroad into the settlement.[2]