Koxinga (simplified Chinese: 国姓爷; traditional Chinese: 國姓爺; pinyin: Guóxìngyé; Wade–Giles: Kuo-hsing-yeh; Pe̍h-ōe-jī: Kok-sèng-iâ/Kok-sìⁿ-iâ; literally "Lord with the Imperial Surname") is the customary Western spelling[8] of the popular appellation of Zheng Chenggong (simplified Chinese: 郑成功; traditional Chinese: 鄭成功; pinyin: Zhèng Chénggōng; Wade–Giles: Cheng Ch'eng-kung; Pe̍h-oē-jī: Tēⁿ Sêng-kong; Pha̍k-fa-sṳ: Tshàng Sṳ̀n-Kûng; Foochow Romanized: Dâng Sìng-gŭng), a military leader who was born in 1624 in Hirado, Japan to Zheng Zhilong, a Chinese merchant/pirate, and his Japanese wife and died in 1662 on the island of Formosa (Taiwan).

A Ming loyalist and the arch commander of the Ming troops on the maritime front for the later monarchs of the withering dynasty, Koxinga devoted the last 16 years of his life to resisting the conquest of China by the Manchus of Qing Dynasty. Upon defeating the forces of the Dutch East India Company (VOC) on Formosa in his last campaign in 1661–1662, Koxinga took over the island in order to support his grand campaign against the Manchu-ruled Qing Dynasty. After Koxinga's death, however, his son and successor, Zheng Jing (鄭經), gradually became the ruler of an independent Kingdom of Tungning, the first Chinese state to rule the island.