Cát Hải district

Cát Hải is a rural district (huyện) of Hai Phong, the third largest city of Vietnam. It includes the old Cát Bà town since 1977.

As of 2018 the district had a population of 43,187. The districts covers an area of 295 km2. The district capital lies at Cát Bà (township).

The island is subject to major land developments. Vinfast is building an automobile factory on the southern half of the island, and Sun Group is developing a holiday resort on the northern half. A 5.44 km long bridge - the longest sea crossing in Vietnam - connects the island to Hai Phong.