Haidian, Beijing

Haidian
海淀区
Haidian District
Location of Haidian District in Beijing
Interactive map of Haidian
Coordinates (Haidian government): 39°57′36″N 116°17′54″E / 39.9600°N 116.2983°E / 39.9600; 116.2983
CountryPeople's Republic of China
MunicipalityBeijing
Township-level divisions22 subdistricts
5 towns
2 townships
Area
 • Total
431 km2 (166 sq mi)
Population
 (2020)
 • Total
3,133,469
 • Density7,270/km2 (18,800/sq mi)
Time zoneUTC+8 (China Standard)
Postal code
100080
Area code0010
Websitebjhd.gov.cn

Haidian (Chinese: 海淀区; pinyin: Hǎidiàn Qū) is a northwest urban district of Beijing, bordering Xicheng and Fengtai.

It is 431 km2 (166 sq mi) in area, making it the second-largest district in urban Beijing area (after Chaoyang), and is home to 3,133,469 inhabitants as of November 2020. According to the latest 2025 census data, the population of Haidian District is 3.122 million.