Fon is a village in Tønsberg Municipality in Vestfold county, Norway.

The village is located about 3 kilometres (1.9 mi) to the west of the village of Svinevoll, about 6 kilometres (3.7 mi) to the northwest of the village of Revetal, and about 20 kilometres (12 mi) to the northwest of the city of Tønsberg.

Fon hosts a small music festival called Revårock, held here since 2002.

It served children from first to fourth grade, and it was part of the Fon Early Development Center and Primary School (Norwegian: Fon oppvekstsenter), along with the Vivestad and Fon preschools.

[5] Since 2009, the area's children have attended the Kirkevoll Primary School in Brekkeåsen.