The Nadelhorn (4,327 m) is a mountain in the PennineAlps in Switzerland. It is the highest point on the Nadelgrat, a high-level ridge running roughly north–south above the resort of Saas-Fee to the east, and the Mattertal to the west. Its three ridges join to form a sharp-pointed summit, which looks like a needle (German: Nadel) when seen from the north. The other summits on the Nadelgrat are the Stecknadelhorn and Hohberghorn.
It was first climbed by Franz Andenmatten, Baptiste Epiney, Aloys Supersaxo and J. Zimmermann on 16 September 1858.