Lankao County
| Lankao County 兰考县 | |
|---|---|
| Lankao Welcome Sign viewed from HSR | |
| Coordinates: 34°41′24″N 114°48′36″E / 34.69000°N 114.81000°E | |
| Country | People's Republic of China | 
| Province | Henan | 
| Prefecture-level city | Kaifeng | 
| County seat | Chengguan (城关镇) | 
| Area | |
|  • Total | 1,116 km2 (431 sq mi) | 
| Population  (2019) | |
|  • Total | 652,900 | 
| • Density | 590/km2 (1,500/sq mi) | 
| Time zone | UTC+8 (China Standard) | 
| Postal code | 475300 | 
| Area code | 0378 | 
| Website | www | 
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.