Woody Island, also called Yongxing Island (simplified Chinese: 永兴岛; traditional Chinese: 永興島; pinyin: Yǒngxīng Dǎo; lit. 'Eternal Prosperity Island') by China and Taiwan and Phú Lâm Island (Vietnamese: Đảo Phú Lâm) by Vietnam (and formerly French: Île Boisée, lit. 'Wooded Island' by French Indochina), is the largest of the Paracel Islands in the South China Sea (SCS), with an area of 2.1 square kilometres (0.81 sq mi). As of 2014, it has a population of almost 1,500, with roads, banks and an air strip.

The Paracel Islands are a group of islands, reefs, banks and atolls in the northwestern part of the South China Sea. Woody Island is part of the Amphitrite Group in the eastern Paracels and is approximately equidistant from Hainan and the Vietnam coast.

The island has been under the control of the People's Republic of China (PRC) since 1956. Sansha City, which administers PRC-controlled territories in Spratly and Paracel Islands, has its administrative seat located on the island. The island is claimed by the Republic of China (ROC, Taiwan) and Vietnam.