Avignonet-Lauragais (; ) is a commune in the Haute-Garonne department in southwestern France.
In 1242 Avignonet-Lauragais was the site of a massacre of Inquisitors by members of a heretical garrison at the Castle of Montségur. The massacre led to the Siege of Montségur.
Avignonet-Lauragais is twinned with: