stylistic:style_transfer, information:classification
Demographics

As of 2020, Shenzhen had a total permanent population of 17,560,000, with 5,874,000 (33.4 percent) of them hukou holders (registered locally). As Shenzhen is a young city, senior citizens above 60 years old took up only 5.36 percent of the city's total population. Despite this, the life expectancy in Shenzhen is 81.25 in 2018, ranking among the top twenty cities in China. The male to female ratio in Shenzhen is 130 to 100, making the city having the highest sex disparity in comparison to other cities in Guangdong. Shenzhen also has a high birth rate compared to other Chinese cities with 21.7 babies for every 10,000 of its 13.44 million population in 2019. Based on the population of its total administrative area, Shenzhen is the fifth most populous city proper in China. Shenzhen is part of the Pearl River Delta Metropolitan Region (covering cities such as Guangzhou, Dongguan, Foshan, Zhongshan, Zhuhai, Huizhou, Hong Kong, and Macau), the world's largest urban area according to the World Bank, which has a population of 78 million according to the 2020 Census.

Before Shenzhen's establishment as a SEZ in 1980, the area was composed mainly of Hakka and Cantonese people. When the SEZ was established, the city attracted migrants from all around Guangdong, including Hakka, Cantonese, and Teochew, as well as migrants from Southern and Central Chinese provinces such as Hunan, Guangxi, Jiangxi, Sichuan, and Henan. Most of these migrants live in urban villages called chengzhongcun (城中村; ' village in the city ') such as Baishizhou in the Nanshan District. Shenzhen also has a notable Korean minority based in the Nanshan District and the Futian District originating from migrants moving to Shenzhen to work for South Korean companies that had branched out into the city when China had opened up.

Due to Shenzhen's population overshooting the 14.8 million population target for 2016 to 2020, the Shenzhen justice bureau on 25 May 2021 announced it would make it harder to earn a hukou to live in the city. In regards to the registered population (hukou), Shenzhen experienced an increase of 2.178 million (58.9 percent) registered residents in the city from 2015 to 2020. The city's permanent population increased by 7,136,088 (68.46 percent) from 2010 to 2020, for an average annual growth rate of 5.35%.