Lanshan County (simplified Chinese: 蓝山县; traditional Chinese: 藍山縣; pinyin: Lánshān Xiàn) is a county of Hunan Province, China, it is under the administration of Yongzhou prefecture-level City.

Located on the south margin of the province, it is adjacent to the northern border of Guangdong.

[4] The county has eight towns and six ethnic townships of Yao people under its jurisdiction.

[6] The county is the source place of the Xiang River, originating from Yegou Mountain (野狗岭) in Zhulin Village (竹林村) of Xiangjiangyuan Town.

the two national expressways and the other three Hunan Provincial Highway of S216, S322 and S324 form the main road network connecting the county.