Xiamen is a sub-provincial city in southeastern Fujian, People's Republic of China, beside the Taiwan Strait. It is divided into six districts: Huli, Siming, Jimei, Tong'an, Haicang, and Xiang'an. All together, these cover an area of 1,700.61 square kilometers (656.61 sq mi) with a population of 5,163,970 as of 2020 and estimated at 5.308 million as of 31 December 2022. The urbanized area of the city has spread from its original island to include most parts of all six of its districts, as well as 4 Zhangzhou districts, which form a built-up area of 7,284,148 inhabitants. This area also connects with Quanzhou in the north, making up a metropolis of nearly ten million people. The Kinmen Islands (Quemoy) administered by the Republic of China (Taiwan) lie less than 6 kilometers (4 mi) away separated by Xiamen Bay. As part of the Opening Up Policy under Deng Xiaoping, Xiamen became one of China's original four special economic zones opened to foreign investment and trade in the early 1980s.

Fujian is a province on the southeastern coast of China. Fujian is bordered by Zhejiang to the north, Jiangxi to the west, Guangdong to the south, and the Taiwan Strait to the east. Its capital is Fuzhou and its largest city by population is Quanzhou, other notable cities include the port city of Xiamen and Zhangzhou. Fujian is located on the west coast of the Taiwan Strait as the closest geographically and culturally to Taiwan. Certain islands such as Kinmen are only approximately 10 km (6.2 mi) east of Xiamen in Fujian.