Tai'an is a prefecture-level city in Western Shandong Province of the People's Republic of China. Centered on Mount Tai, the city borders the provincial capital of Jinan to the north, Zibo to the east, Linyi to the southeast, Liaocheng to the extreme west and Jining to the south. To the west, Tai'an is separated from the province of Henan by the Yellow River. Its population was 5,494,207 as of the 2010 census, of whom 1,735,425 lived in the built-up area made of two urban districts.