Changshan County

 is a county under the jurisdiction of the prefecture-level city of Quzhou in the west of Zhejiang Province, People's Republic of China, bordering Jiangxi Province to the southwest. The county's total area is 1099 square kilometers, and its population is 320,000 people. The county's postal code is 324200. The county government is located at 29 Shengli Road in Tianma town.

Administrative divisions
The county administers 7 towns, 14 townships, 11 residential areas, and 341 administrative villages.

Towns (镇): Tianma, Zhaoxian, Huibu, Fangcun, Qiuchuan, Baishi, and Qingshi.

Townships (乡): Hejia, Songfan, Donglu, Xinqiao, Jiarong, Xinchang, Jinyuan, Longrao, Tonggong, Qiankou, Daqiaotou, Wuli, Dong'an, and Gedi.