General Information

Dong Thap Province, Southern Vietnam
Capital: Cao Lanh
Area: 3,238 km² (1,250 sq mi)
Population: About 1.8 million
Density: 510/km² (1,300/sq mi)
Demographics: Vietnamese, Khmer, Hoa, Ngai
Calling code: 67

Dong Thap is a province in the Mekong Delta region of southern Vietnam. Dong Thap is 165 km away from Ho Chi Minh City, borders Pray Veng province (Cambodia) in the North with a length of more than 48 km; Vinh Long and Can Tho in the South; An Giang in the West; and Long An and Tien Giang in the East.


Sa Dec

Dong Thap is a newly-cultivated area in about 17th and 18th century, under Nguyen dynasties. Foundation of this area adhered to powerful struggling history against nature, dangerous animals and aggressors. The South of Dong Thap province whose centre is Sa Dec (Sa Ðéc) plays a very significant role. Many researches have shown that overseas Vietnamese got to come to Sa Dec area for reclaiming and setting up hamlets at least at the end of 17th century or at the beginning of 18th century.

Sa Dec is a Khmer word meaning “iron market”. Does this market sell agricultural tools made of iron or was the frame of this market made of iron? There has not had any reasonable explanations for these concerns. However, Sa Dec is probably the newest area on the way to develop the country in 1757 by Nguyen Cu Trinh, a mandarin who was famous for his achievement in reassuring people in Quang Ngai. After the civil war between Nguyen Anh and Tay Son (Tây Son) siblings, Gia Long was on the throne to help stabilize Sa Dec and made it become a part of Vinh An (Vinh An) district. Sa Dec then with a favourable geographical location, did become the most crowded trading centre of Mekong delta at that time, only smaller than Sai Gon (Sài Gòn), Cho Lon.

Cao Lanh

Cao Lanh (Cao Lãnh) located in the North of Tien river also has a glorious history. It is recorded in historical books that at the end of 17th century, or early in 18th century, some overseas Vietnamese at Ba Canh hamlet (currently belonging to Dap Da commune, Dap Da town, Binh Dinh – Bình Ðinh- province) came to cultivate, settled down near Cai Sao Thuong (Cái Sao Thuong) rivulet, forming Ba Canh commune. Nguyen Tu was accredited with having gathered people, cultivated and set up hamlets. He was elevated to the status of Tien Hien – an anciently righteous person – of the village.

Nowadays, that stele is near Dinh Trung (Ðình Trung) bridge, Ward 2, Cao Lanh city. Cao Lanh (Cao Lãnh) used to be the stopover of many patriots such as Tran Chanh Chieu, Nguyen Sinh Sac etc. People in Cao Lanh consistently struggled, tremendously contributing to the absolute victory of South of Vietnam in historical campaign Ho Chi Minh, united the whole country, and Cao Lanh, since April 30, 1975, was merged with Sa Dec (Sa Ðéc) to become Dong Thap nowadays.



The topography of the province is quite flat with a sloping tendency from North to South and West to East; separating into 2 large regions: one in the North of Tien River (having an area of 250,731ha, in Dong Thap Muoi area) and one in the South of Tien River (having an area of 73,074ha, lying between Tien River and Hau River). Dong Thap benefits from a large river, channel and spring system, frequently silt-aggraded soil, and permanently fresh and non-saline water source.


Dong Thap is in the tropical climate zone, consistently in the whole province. There are two evident seasons; rainy season from May to Nov, and dried season from Dec to Apr of the following year. Average rainfall ranges from 1,682-2,005mm, mostly in rainy season which accounts for 90-95% of annual rainfall. Such climate is fairly advantageous for agricultural development. The average temperature is 27oC, of which the highest is 34.3oC, and lowest is 21.8oC. The hydrology of the province is under the influence of 3 factors: floodwater from upper Mekong River, in-field rain and tides of the South East Asia Sea. The hydrologic regime has 2 seasons: exhausted season from Dec to Jun of the following year and flood season from Jul to Nov.


With an area of 3,374km², Dong Thap province has twelve administrative regions: one provincial city (Cao Lãnh), two towns (Sa Dec and Hong Ngu) and nine districts (Cao Lanh, Thap Muoi, Thanh Binh, Tam Nong, Tan Hong, Hong Ngu, Chau Thanh, Lai Vung and Lap Vo).

List of Dong Thap Administrative Units

Cities and Towns

– Cao Lãnh
– Sa Dec
– Hong Ngu


– Cao Lãnh
– Châu Thành
– Hong Ngu
– Lai Vung
– Lap Vò
– Tam Nông
– Tân Hong
– Thanh Bình
– Tháp Muoi
Whole Province: 14 wards, 129 communes and 9 townships

For more details about other provinces and cities of Vietnam, please follow this link.

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