艾尔萨岩是苏格兰的岛屿，由南艾尔郡负责管辖，长1.3公里、宽1.1公里，面积0.99平方公里，最高点海拔高度338米，海岸线长度约3.2公里，岛上无人居住。

Ailsa Craig (/ˈeɪlsə/; Scottish Gaelic:Creag Ea****id) is an island of 99 hectares (240 acres) in the outer Firth of Clyde, 16 kilometres (9.9 mi) from mainland Scotland, upon which blue hone granite was quarried to make curling stones. The now uninhabited island is formed from the volcanic plug of an extinct volcano.