Sæbyggjenuten is a mountain on the border of Agder and Telemark counties in southern Norway. The 1507 m tall mountain is the highest point in Bykle municipality as well as for all of Agder county, and in the whole region of Southern Norway (Sørlandet). The mountain sits on the border of the municipalities of Bykle (in Agder county) and Tokke (in Telemark county). It is located about 20 km west of Dalen in Telemark and also about 20 km northeast of the village of Bykle in Agder.