Liaoyuan (simplified Chinese: 辽源; traditional Chinese: 遼源; pinyin: Liáoyuán) is a prefecture-level city in the west of Jilin province in Northeast China, bounded on the west by Liaoning province. Liaoyuan city lies some 100 km southeast of Changchun, the capital of Jilin province. Covering an area of 5,125 square kilometers, Liaoyuan is the smallest among the prefecture-level cities in Jilin. Liaoyuan has a toal population of 1,176,645, while the built up area has a population of 462,233.