The Massacre of Fort Dauphin was a massacre that took place in the evening of 27 August 1674 in the coastal French colony of Fort-Dauphin, in the Anosy region of modern-day Tolagnaro, Madagascar. Perpetrated by the nearby indigenous Antanosy population, it was directed against French colonists who had been settled in Fort-Dauphin beginning in 1642 as part of an initiative to settle the island of Madagascar by the Kingdom of France. The massacre marked the end of the first wave of French colonization of Madagascar.