Hạ Long is a first-class provincial city and the capital city of Quảng Ninh province, Vietnam. It was found in 1993, when the old capital, Hòn G…Hạ Long is a first-class provincial city and the capital city of Quảng Ninh province, Vietnam. It was found in 1993, when the old capital, Hòn Gai, was merged with Bãi Cháy, the main tourist area. The city mainly lies on Hạ Long Bay, and is located at about 178 km east of Hà Nội. The city's population in 2019 was 270,054.