Dehui is a county-level city located in the Jilin Province of Northeast China. It falls under the administration of the prefecture-level city of Changchun and is situated in the middle of the Songliao Plain, approximately 80 kilometres north-northeast of central Changchun.
The city has a total population of 906,000, with a rural population accounting for 753,000. Its administrative structure consists of 10 towns, four townships, and four subdistricts, which encompass 308 villages. Dehui shares borders with Yushu to the northeast, Jiutai to the south, Kuancheng District to the southwest, Nong'an County to the west, and the prefecture-level cities of Jilin to the southeast and Songyuan to the northwest.