Location of the seat in Henan
|Country||People's Republic of China|
|County seat||Chengguan (城关镇)|
|• Total||1,116 km2 (431 sq mi)|
|• Density||590/km2 (1,500/sq mi)|
|Time zone||UTC+8 (China Standard)|
Lankao County (simplified Chinese: 兰考县; traditional Chinese: 蘭考縣; pinyin: Lánkǎo Xiàn) is a county of Kaifeng, Henan, China. It has an area of 1,116 km2 (431 sq mi) and a population of 760,000.
It was the site of the Battle of Lanfeng during the Second Sino-Japanese War.
As 2012, this county is divided to 5 towns and 11 townships.