Hanoi
Demographics

During the French colonial period, as the capital of French Indochina, Hanoi attracted a considerable number of French, Chinese and Vietnamese from the surrounding areas. In the 1940s the population of the city was 132,145. After the First Indochina War, many French and Chinese people left the city to either move south or repatriate.

Hanoi's population only started to increase rapidly in the second half 20th century. In 1954, the city had 53 thousand inhabitants, covering an area of 152 km. By 1961, the area of the city had expanded to 584 km, and the population was 91,000 people. In 1978, National Assembly (Vietnam) decided to expand Hanoi for the second time to 2,136 km, with a population of 2.5 million people. By 1991, the area of Hanoi continued to change, decreasing to 924 km (357 sq mi), but the population was still over 2 million people. During the 1990s, Hanoi's population increased steadily, reaching 2,672,122 people in 1999. After the most recent expansion in August 2008, Hanoi has a population of 6.233 million and is among the 17 capitals with the largest area in the world. According to the 2009 census, Hanoi's population is 6,451,909 people. As of 1 April 2019, Hanoi had a population of 8,053,663, including 3,991,919 males and 4,061,744 females. The population living in urban areas is 3,962,310 people, accounting for 49.2% and in rural areas is 4,091,353 people, accounting for 50.8%. Hanoi is the second most populous city in the country, after Ho Chi Minh City (8,993,082 people). The average annual population growth rate from 2009 to 2019 of Hanoi is 2.22%/year, higher than the national growth rate (1.14%/year) and is the second highest in the Red River Delta, only after Bắc Ninh Province (2.90% / year).

Nowadays, the city is both a major metropolitan area of Northern Vietnam, and also the country's cultural and political centre, putting a lot of pressure on the infrastructure, some of which is antiquated and dates back to the early 20th century. It has over eight million residents within the city proper and an estimated population of 20 million within the metropolitan area.

The number of Hanoians who have settled down for more than three generations is likely to be very small when compared to the overall population of the city. Even in the Old Quarter, where commerce started hundreds of years ago and consisted mostly of family businesses, many of the street-front stores nowadays are owned by merchants and retailers from other provinces. The original owner family may have either rented out the store and moved into the adjoining house or moved out of the neighborhood altogether. The pace of change has especially escalated after the abandonment of central-planning economic policies and relaxing of the district-based household registrar system.

Hanoi's telephone numbers have been increased to 8 digits to cope with demand (October 2008). Subscribers' telephone numbers have been changed in a haphazard way; however, mobile phones and SIM cards are readily available in Vietnam, with pre-paid mobile phone credit available in all areas of Hanoi.
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