| Nga Sơn district | |
| Settlement Type: | District |
| Native Name: | Huyện Nga Sơn |
| Pushpin Map: | Vietnam |
| Pushpin Map Caption: | Location of the seat of the district in Vietnam |
| Pushpin Mapsize: | 300 |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name1: | North Central Coast |
| Subdivision Type2: | Province |
| Subdivision Name2: | Thanh Hóa |
| Seat Type: | Capital |
| Seat: | Nga Sơn |
| Unit Pref: | Imperial |
| Area Total Km2: | 151 |
| Population As Of: | 2018 |
| Population Total: | 155,200 |
| Timezone: | UTC + 7 |
| Utc Offset: | +7 |
| Coordinates: | 19.9833°N 163°W |
| Postal Code: | 440000 |
Nga Sơn is a district (huyện) of Thanh Hóa province in the North Central Coast region of Vietnam. The district capital is Nga Sơn.
The district features many historical vestiges. These include Từ Thức grotto, Tien Pagoda (Chùa Tiên), and legends referring to Mai An Tiêm who, the story goes, was exiled to the then uninhabited islands, now known as Nga Son and Thanh Hoa.
Nga Sơn villagers were known for planting sedge -a grass-like plant with triangular stems, and weaving mats.
In 2018, the population of Nga Sơn was estimated to be about 155,200.[1]
The district is located northeast of the Thanh Hóa province. It is approximately 42km (26miles) from Thanh Hóa. The district shares a border to the north and east with the Ninh Bình province, to the west with the Hà Trung district, and to the south with the Hậu Lộc district.
The district terrain consists mainly of plains and includes the Len River, which flows through the southern district of Nga Sơn.
With a coastline about 20km (10miles) long, Nga Sơn annually encroaches into the sea some 80km-100kmkm (50miles-100mileskm) per year due to alluvium deposits from the Red and Day Rivers.
Nga Son hosts multiple district schools.[2]