The Valais Blacknose (German: Walliser Schwarznasenschaf) is a breed of domestic sheep originating in the Valais region of Switzerland.It is a dual-purpose breed, raised both for meat and for wool.

The breed originates in the mountains of the canton of Valais – from which its name derives – and of the Bernese Oberland. It is documented as far back as the fifteenth century, but the present German name was not used before 1884; the breed standard dates from 1962. In the past there was some cross-breeding with imported sheep, in the nineteenth century of Bergamasca and Cotswold stock, and in the twentieth century of the Southdown breed.