Đầm Hà is a district of Quảng Ninh province in the northeastern region of Vietnam. As of 2003 the district had a population of 31,414. The distri…Đầm Hà is a district of Quảng Ninh province in the northeastern region of Vietnam. As of 2003 the district had a population of 31,414. The district covers an area of 290 km². The district capital lies at Đầm Hà.