Romsdalshornet is a mountain in the municipality of Rauma in Møre og Romsdal county, Norway.

The mountain is located 10 kilometres (6.2 mi) southeast of the town of Åndalsnes, along the Rauma River in the Romsdalen valley.

The Rauma railway line and the European route E136 highway both pass by the mountain.

The first "official" ascent was 1 September 1881 by the Danish climber Carl Hall, together with Norwegians Erik Norahagen and Mathias Soggemoen.

They arrived only to discover a cairn set up by Christen Smed and Hans Bjermeland around 1828.