| Official Name: | Altorf, Illinois |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Illinois#USA |
| Pushpin Label: | Altorf |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Kankakee |
| Subdivision Type3: | Township |
| Subdivision Name3: | Bourbonnais |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 600 |
| Coordinates: | 41.1903°N -87.9622°W |
| Area Codes: | 815 & 779 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 403473 |
Altorf is an unincorporated community in Kankakee County, in the U.S. state of Illinois.
Altorf was laid out in 1858, taking its name after Altdorf, in Switzerland.[1] A post office was established at Altorf in 1886, and remained in operation until 1887.[2]