卡斯姆（爱沙尼亚语：Käsmu）是位于爱沙尼亚北部西维鲁县的一个村镇。卡斯姆首次被提及是在1453年。现在卡斯姆有人口131人。

Käsmu (German:Kaspervik, Hasterwieck) is a village in Vihula Parish, Lääne-Viru County, in northern Estonia, on the territory of Lahemaa National Park. It's located northwest of Võsu, on the Käsmu Peninsula in the Gulf of Finland, surrounded by the Eru Bay to the west and the Käsmu Bay to the east.