Mainland China, the Chinese mainland or simply the mainland, is a geopolitical term that refers to the area under the jurisdiction of the People's Republic of China (PRC). The term generally excludes the PRC Special Administrative Regions of Hong Kong and Macau.

There are two terms in Chinese for "mainland". Namely, Dalu (simplified Chinese: 大陆; traditional Chinese: 大陸), which means "continent", and Neidi (内地 / 內地), literally "inner land". In the PRC, the usage of the two terms are generally interchangeable and there is no prescribed method of reference in any jurisdiction. To emphasize "equal footing" in cross-strait relations, the term is used in official contexts with reference to Taiwan, with the PRC referring to itself as "the mainland side" (as opposed to "the Taiwan side"). But in its relations with Hong Kong and Macau, the PRC government refers to itself as "the Central People's Government".

By 1949, the Communist Party of China's (CPC) People's Liberation Army had largely defeated the Kuomintang (KMT)'s National Revolutionary Army in the Chinese Civil War on the mainland. This forced the Kuomintang to relocate the Government and institutions of the Republic of China to the relative safety of Taiwan, an island which was placed under the control of the Republic of China after the surrender of Japan at the end of World War II in 1945. With the establishment of the People's Republic of China on October 1, 1949, the CPC-controlled government saw itself as the sole legitimate government of China, competing with the claims of the Republic of China, whose authority is now limited to Taiwan and other islands. This has resulted in a situation in which two co-existing governments compete for international legitimacy and recognition as the "government of China".

China (ⁱ/ˈtʃaɪnə/; Chinese: 中国; pinyin: Zhōngguó; see also Names of China), officially the People's Republic of China (PRC), is the world's most-populous country, with a population of over 1.3 billion. Covering approximately 9.6 million square kilometres, the East Asian state is the world's second-largest country by land area, and the third- or fourth-largest in total area, depending on the definition of total area.

The People's Republic of China is a single-party state governed by the Communist Party of China. It exercises jurisdiction over 22 provinces, five autonomous regions, four directly controlled municipalities (Beijing, Tianjin, Shanghai, and Chongqing), and two mostly self-governing special administrative regions (Hong Kong and Macau). Its capital city is Beijing. The PRC also claims Taiwan—which is controlled by the Republic of China (ROC), a separate political entity—as its 23rd province, a claim controversial due to the complex political status of Taiwan and the unresolved Chinese Civil War. The PRC government denies the legitimacy of the ROC.