Nelaug is a village in the southern part of the municipality of Åmli in Aust-Agder county, Norway. The population (2001) was 161. The village lies east of the Nelaug lake, which is regulated by a hydroelectric power plant. The most notable feature in the village is the Train station, Nelaug Station, which is the junction between the Sørlandsbanen main line and the Arendalsbanen branch line. Nelaug school is a 1st through 6th grade elementary school.