Da'an is a city in northwestern Jilin province in Northeast China. It sits on the southern bank of the Songhua River, which forms the border with Heilongjiang province at this point. The city lies under the administration of Baicheng City, which is located 115 kilometres (71 mi) to the west, and it is 57 kilometres (35 mi) northwest of Songyuan.
The city had a population of 423,700, including 423,000 permanent residents. Its position on the Songhua River places it along one of the major waterways of Northeast China.