Illinois
| Name | Illinois |
| Type | Tanker |
| GRT | 5,225 tons |
| Country |  American |
| Built | 1913 |
| Builder | Newport News SB. & DD. Co., Newport News, Va |
| Operator | The Texas Company, New York |
| History |
U-boat attacks on Tanker Illinois
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 18 Mar 1917 | UC 21 (Reinhold Saltzwedel) | Sunk | Captured and scuttled 20 miles N of Alderney | London - Port Arthur | in ballast | 0 |
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