Mavis
| Name | Mavis |
| Type | Q-ship |
| GRT | 1,295 tons |
| Country |  British |
| Built | 1903 |
| Builder | Wigham Richardson & Co., Ltd., Newcastle |
| Operator | Royal Navy |
| History | Peace-time operator: Cork Steamship Co., Ltd., Cork |
U-boat attacks on Q-ship Mavis
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 3 Jun 1917 | UC 29 (Ernst Rosenow) | Damaged | 20 miles S of Wolf Rock - damaged only by torpedo | 4 |
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