Signilskär
| Signilskär, as seen from a passing ferry | |
| Geography | |
|---|---|
| Coordinates | 60°11′50″N 19°20′02″E / 60.197128°N 19.3339°E | 
| Administration | |
| Finland | |
| Island | Åland | 
| Demographics | |
| Population | 0 | 
Signilskär is one of the westernmost islands in Finland, being part of the archipelago of Åland in the Gulf of Bothnia. The island, along with Katajaluoto, Hamnskär, and North and South Västerskär, makes up part of the municipality of Hammarland. Beyond Signilskär is Märket, the westernmost point of Finland.