|Country||People's Republic of China|
|• Total||2,499.35 km2 (965.00 sq mi)|
|• Density||170/km2 (440/sq mi)|
|Time zone||UTC+8 (China Standard)|
Lanxi County (simplified Chinese: 兰西县; traditional Chinese: 蘭西縣; pinyin: Lánxī Xiàn) is a county of western Heilongjiang province, People's Republic of China. It is under the jurisdiction of the prefecture-level city of Suihua.
Huma County is divided into 4 subdistricts, 8 towns and 7 townships.
The population of the district was 466,725 in 1999.