贝塔岛是南极洲的岛屿，处于卡帕岛以北和阿尔法岛西南面，属于帕默群岛中梅尔基奥群岛的一部分，在1927年由英国研究队命名，现时由南极条约体系管理。

•  本条目引用的公有领域材料来自美国地质调查局的文档《贝塔岛》(数据来自地名信息系统)。

Beta Island (64°19′S 63°0′W / 64.317°S 63.000°W / -64.317; -63.000) is a small island which lies immediately north of Kappa Island and close southwest of Alpha Island in the Melchior Islands, Palmer Archipelago. The name, derived from the second letter of the Greek alphabet, was probably given by Discovery Investigations personnel who roughly surveyed the island in 1927. The island was also surveyed by Argentine expeditions in 1942, 1943 and 1948.