Seis am Schlern (Austrian German: [ˈsaɪs am ˈʃlɛrn]; Italian: Siusi allo Sciliar [ˈsjuːzi allo ʃʃiˈljar]) is an Alpine village in South Tyrol, in the Trentino-Alto Adige/Südtirol region of northern Italy. It is a frazione (borough) of the comune (municipality) of Kastelruth.