Zhenlai County (simplified Chinese: 镇赉县; traditional Chinese: 鎮賚縣; pinyin: Zhènlài Xiàn) is a county in northwestern Jilin province, China, occupying the northernmost part of the province and bordering Heilongjiang to the east and Inner Mongolia to the west. It is under the administration of Baicheng City, with a population of 310,000 residing in an area of 5,389 km2 (2,081 sq mi).