The Lagginhorn (4,010 m) is a mountain in the Pennine Alps in Switzerland.

It lies a few kilometres north of the slightly higher Weissmies and also close to the slightly lower Fletschhorn on the north.

The first ascent was by Edward Levi Ames and three other Englishmen, together with local Saas Grund clergyman Johann Josef Imseng, Franz Andenmatten and three other guides on 26 August 1856.

The Lagginhorn is characterised by rock climbing rather than snow climbs and possesses a lengthy scramble along the South Ridge including one or more exposed abseils:[4]

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