Gaspar da Costa (d. Penfui, West Timor, 9 November 1749) was the leader or tenente geral (lieutenant general) of the Portuguese-speaking Topasses, a Eurasian group that dominated much of the politics on Timor in the early modern period. He was largely responsible for the dramatic collapse of Portuguese power in West Timor, a process that laid the foundations for the modern division of Timor in an Indonesian and an independent part.