Orchid Island, also known by other names, is a 45 km2 (17 sq mi) volcanic island off the southeastern coast of Taiwan, which Orchid Island is part of. It is separated from the Batanes of the Philippines by the Bashi Channel of the Luzon Strait. The island and the nearby Lesser Orchid Island are governed as Lanyu Township in Taitung County, which is one of the county's two insular townships.

Taiwan, officially the Republic of China (ROC), is an island country in East Asia. The island of Taiwan, formerly known as Formosa, makes up 99% of the land area of the territories under ROC control. The main island is 35,808 square kilometres (13,826 sq mi) and lies some 180 kilometres (112 mi) across the Taiwan Strait from the southeastern coast of the People's Republic of China (PRC). The East China Sea lies to the north of the island, the Philippine Sea to its east, the Luzon Strait directly to its south and the South China Sea to its southwest. The ROC also controls a number of smaller islands, including the Penghu archipelago in the Taiwan Strait, the Kinmen and Matsu Islands in Fuchien near the PRC's coast, and some of the South China Sea Islands.