Tong'an District is a northern mainland district of Xiamen which faces Kinmen County, Republic of China. To the north is Anxi and Nan'an, and to the south is Jimei. Tong'an is also east of Lianxiang and Changqin to the West. It covers 657.59 square kilometres
Tong'an District has a population of 496,129 residents.
The District deserves a nickname of Silver City because the old city resembled a sycee in plan view.