Hanoi means "inside the rivers" after an 1831 rename
Vietnam's capital covers about 3,359 square kilometres with some 8.8 million people in 2025. Lý Thái Tổ named it Thăng Long—ascending dragon—in 1010; Nguyễn emperor Minh Mạng coined Hà Nội in 1831 after the court moved to Huế, and the Red River bend still shapes dragon toponyms.
Palaeolithic Sơn Vi tools near Ba Vì and Đông Anh date roughly 10,000–20,000 years ago; for millennia afterward rising seas drowned the plain until resettlement about four thousand years ago. Third-century-BCE Cổ Loa citadel enclosed some 600 hectares as an early political centre. Han conquest followed Nanyue; the Trưng Sisters rose from Mê Linh in AD 40 before Ma Yuan's defeat of them in 43. Tang-era Đại La, rebuilt by Gao Pian in 866 with walls spanning 6,344 metres, held about 25,000 people including Persian, Arab, Indian, and Cham traders who knew the city as Luqin.
Thăng Long remained Đại Việt's capital until 1397, returned under Lê Lợi as Đông Kinh in 1428—source of the Western name Tonkin—and later estimates put seventeenth-century population near 100,000. Gia Long shifted the national capital to Huế in 1802 and swapped the dragon character for a homophone meaning ascent and prosperity, hoping to dampen loyalty to the fallen Lê house. French forces took the city in 1873 and made it Indochina's capital in 1902. After 1945 revolutions and partition eras, reunified Vietnam confirmed Hanoi as capital in 1976. The Imperial Citadel of Thăng Long, Hoàn Kiếm and West Lakes, and layered pre-colonial, French, and tube-house fabrics define the streetscape.
In 2023 the city posted about US$48 billion in regional GDP, second only to Ho Chi Minh City, hosted 78 foreign embassies, and welcomed 18.7 million visitors in 2022. Its boundaries ballooned in August 2008, when Hà Tây Province and Mê Linh District were absorbed, and public protest later won a low-rise policy around Hoàn Kiếm Lake. National university and army headquarters sit here beside Ba Vì park on the outskirts—an ascending-dragon capital still governing from inside the rivers.
Source: Hanoi
