Sebald de Weert, Dutch captain, vice-admiral of the Dutch East India Company (d. 1603)

Sebald or Sebalt de Weert (May 2, 1567 – May 30 or June 1603) was a Flemish captain and vice-admiral of the Dutch East India Company (known in Dutch as Vereenigde Oost-Indische Compagnie, VOC). He is most widely remembered for accurately plotting the Falkland Islands in 1600.