| Scottish Gaelic name | Siolaigh |
|---|---|
| Old Norse name | selr-øy |
| Meaning of name | seal island |
| Location | |
  Shillay Shillay shown within the Outer Hebrides | |
| OS grid reference | NF880913 |
| Coordinates | 57°48′N 7°15′W / 57.80°N 7.25°W |
| Physical geography | |
| Island group | Lewis and Harris |
| Area | 47 ha (116 acres) |
| Area rank | 208 [1] |
| Highest elevation | 79 m (259 ft) |
| Administration | |
| Sovereign state | United Kingdom |
| Country | Scotland |
| Council area | Na h-Eileanan Siar |
| Demographics | |
| Population | 0[2] |
 | |
| References | [3][4] |
Shillay (Scottish Gaelic: Siolaigh) is an uninhabited island which lies 2 km north of Pabbay in the Outer Hebrides of Scotland.
The name is derived from the Norse selr-øy meaning seal island and is a Scottish Wildlife Trust reserve owing to its international importance for breeding grey seals.
There is no record or evidence that it has ever seen human habitation.
