Foreign relations of the Republic of China (ROC), more commonly known as Taiwan, are accomplished by efforts of the Ministry of Foreign Affairs of the Republic of China, a cabinet-level ministry of the Government of the Republic of China. It currently has formal diplomatic relations with 11 of the 193 United Nations member states and with the Holy See, which governs the Vatican City State, as of 13 May 2024. In addition to these relations, the ROC also maintains unofficial relations with 59 UN member states, one self-declared state (Somaliland), three territories (Guam, Hong Kong, and Macau), and the European Union via its representative offices and consulates. In 2021, the Government of the Republic of China had the 33rd largest diplomatic network in the world with 110 offices.

Taiwan, officially the Republic of China (ROC), is a country in East Asia. It is located at the junction of the East and South China Seas in the northwestern Pacific Ocean, with the People's Republic of China (PRC) to the northwest, Japan to the northeast, and the Philippines to the south. The territories controlled by the ROC consist of 168 islands with a combined area of 36,193 square kilometres. The main island of Taiwan, also known as Formosa, has an area of 35,808 square kilometres, with mountain ranges dominating the eastern two-thirds and plains in the western third, where its highly urbanized population is concentrated. The capital, Taipei, forms along with New Taipei City and Keelung the largest metropolitan area. With around 23.9 million inhabitants, Taiwan is among the most densely populated countries.