纳斯卡板块，或译纳兹卡板块，以秘鲁南部的纳斯卡地区命名。它是南美洲西岸以外东太平洋中的一个大洋板块。在1968年勒皮雄首次提出的六大板块中，它是南极洲板块的一部分。

纳斯卡板块的东界为一会聚边界消减带，俯冲于南美洲板块和安第斯山脉之下，形成秘鲁-智利海沟。其南界与南极洲板块形成离散边界，即智利海隆，在该处因为海底扩张，岩浆得以溢出。其西界与太平洋板块形成离散边界，即东太平洋海隆。其北界则与科科斯板块形成离散边界，即加拉帕戈斯海隆。在纳斯卡板块的西北角，哥伦比亚海岸以外的太平洋中，它和科科斯板块、太平洋板块形成一个三联点。另一个三联点位于其西南角，智利海岸以外的太平洋中，是纳斯卡、太平洋和南极洲板块相会之处。在这两个三联点处，各存在一个罕见的微板块，即北边的加拉帕戈斯微板块和南边的胡安·费尔南德斯微板块。复活节岛微板块则是又一个微板块，位于胡安·费尔南德斯微板块以北不远处，即复活节岛西边不远处。

The Nazca Plate, named after the Nazca region of southern Peru, is an oceanic tectonic plate in the eastern Pacific Ocean basin off the west coast of South America. The ongoing subduction, along the Peru–Chile Trench, of the Nazca Plate under the South American Plate is largely responsible for the Andean orogeny. The Nazca Plate is bounded on the west by the Pacific Plate and to the south by the Antarctic Plate through the East Pacific Rise and the Chile Rise respectively. The movement of the Nazca Plate over several hotspots has created some volcanic islands as well as east-west running seamount chains that subduct under South America. Nazca is a relatively young plate both in terms of the age of its rocks and its existence as an independent plate having been formed from the break-up of the Farallon Plate about 23 million years ago. The oldest rocks of the plate are about 50 million years old.