Haiphong or Hai Phong is the third-largest city in Vietnam, with an area of 3,194.72 km2 (1,233.49 mi2). It includes Bạch Long Vĩ and Cát Hải islands in the Gulf of Tonkin. Haiphong has a population of 4,664,124 in 2025. Haiphong holds the historical distinction of being the first city in both Vietnam and Mainland Southeast Asia to be electrified.
Haiphong or Hai Phong is the third-largest city in Vietnam, with an area of 3,194.72 km2 (1,233.49 mi2). It includes Bạch Long Vĩ and Cát Hải islands in the Gulf of Tonkin. Haiphong has a population of 4,664,124 in 2025. Haiphong holds the historical distinction of being the first city in both Vietnam and Mainland Southeast Asia to be electrified.