Spydeberg is a municipality in Østfold county, Norway. The administrative centre of the municipality is the village of Spydeberg. It is divided into the parishes Spydeberg, Heli, and Hovin. Spydeberg was established as a municipality on 1 January 1838 (see formannskapsdistrikt).The village of Spydeberg has approximately 5,200 inhabitants. It is located 45 kilometres (28 mi) southeast of Oslo and is easily reached by a bus and a train line.