Xi'an is the capital of Shaanxi province in China. It is a sub-provincial city located on the Guanzhong plain. The city is the most populous in Shaanxi province.
Xi'an is the third-most populous city in Western China, after Chongqing and Chengdu, and is the most populous city in Northwestern China. Based on the city's 2025 1% population sample survey, its estimated year-end resident population was 13.24 million, of whom 10.72 million were urban residents.