伯克纳岛（Berkner Island）是南极洲已知岛屿中的第二大岛，仅次于亚历山大一世岛。伯克纳岛东西长约320公里，宽约135公里，面积约4万3873.1平方公里。伯克纳岛之名来自于美国南极地名咨询委员会（Advisory Committee on Antarctic Names，缩写ACAN或US-ACAN），为纪念一位在南极工作的物理学家洛依德·伯克纳（Lloyd Berkner）。

伯克纳岛虽然是岛，但由于南极大陆冰雪厚重，周围海域冻结成广大的陆缘冰，因此伯克纳岛现时完全被冰雪覆盖，与南极大陆连为一片。

Berkner Island or Berkner Ice Rise or Hubley Island is an ice rise, where bedrock below sea level makes the ice dome upward. If the ice cap melted, it would be under water. Berkner "Island" is high and completely ice-covered and about 320 kilometres (200 mi) long and 150 kilometres (93 mi) wide, with an area of 44,000 km (17,000 sq mi). Berkner is surrounded by the Filchner-Ronne Ice Shelf. The northernmost point of the Berkner is about 20 kilometres (12 mi) from the open sea. It lies in the overlapping portion of the Argentine and the British claims.