Haiphong or Hai Phong is the third-largest city in Vietnam and is the principal port city of the Red River Delta. The municipality has an area of 1,526.52 km2, consisting of 8 urban districts, 6 rural districts and 1 municipal city. Two of the rural districts cover islands in the South China Sea: Bạch Long Vĩ and Cát Hải. It has a population of 2,130,898 in 2023.