Skirveggen is a mountain in Tinn Municipality in Telemark county, Norway. The 1380 m tall mountain is located about 13 km northeast of the village of Tinn Austbygd and about 8 km to the southwest of the village of Nore. It is the highest mountain in the Vegglifjell mountain range which lies along the border of Telemark and Buskerud. The summit lies in Tinn municipality in Telemark, but the border with Nore og Uvdal municipality in Buskerud is only 100 m to the northeast of the peak. The mountain has a steep east flank, the other sides are gently sloped. It has a flat summit, where the actual high point is difficult to make out.