勿里洞岛（Belitung Island），是印度尼西亚一岛屿，位于邦加岛以东南的卡里马塔海峡中，面积约4850平方公里，人口约20万人，属于邦加-勿里洞省管辖，以出产胡椒和锡闻名。

1812年，英国一度占领勿里洞岛，后该岛又被荷兰占领，1824年，英国根据英荷条约放弃对该岛的所有要求。印度尼西亚独立后，该岛成为印尼的一部分。

Belitung (or in English, Billiton) is an island on the east coast of Sumatra, Indonesia in the Java Sea. It covers 4,800.6 km (1,853.5 sq mi), and had a population of 271,868 in 2014. Administratively, it forms part of the province of Bangka-Belitung Islands. The island is known for its pepper and for its tin. It was in the possession of the United Kingdom from 1812 until Britain ceded control of the island to the Netherlands in the Anglo-Dutch Treaty of 1824. Its main town is Tanjung Pandan.