Rakkestad is a municipality in Østfold county, Norway. The administrative centre of the municipality is the village of Rakkestad. It is divided into the parishes of Rakkestad, Degernes, and Os. The municipality is the county's second largest by area and one of Norway's largest agricultural areas.
Rakkestad was established as a municipality on 1 January 1838 (see formannskapsdistrikt). Degernes was separated from Rakkestad as a municipality of its own on 1 January 1917, but it was merged back into Rakkestad on 1 January 1964.