Uông Bí is a city of Quảng Ninh Province in the north-eastern region of Vietnam. As of 2019 the city had a population of 120,982. The City covers an area of 240 km². Uong Bi was promoted from a town to a provincial city February 25, 2011.

Quảng Ninh or Quangninh is a province along the northeastern coast of Vietnam. It is about 153 km (95 mi) east of Hanoi, comprising four cities, two district-level towns and seven rural districts. The provincial capital is Hạ Long. The province covers an area of 6,207.95 km2 (2,396.90 sq mi) and, as of 2023, had a population of 1,413,452. Nearly 80% of the province is mountainous with abundant land, forest, water and mineral resources, with 90% of Vietnam's coal output extracted from the province. The province is also home to Hạ Long Bay, a World Heritage Site that has 1,969 islands, out of which 989 have been given names.