Since the Sui Dynasty, this area belonged to a fairly large administrative unit called Tây Chân rural district (Tây Chân huyện). When the Trần Dynasty was founded, Tây Chân belonged to Thiên Trường prefecture. Its name implies that it was the periphery of a small urban complex called Tức Mặc village, where officials and aristocrats were concentrated.
In the Revival Lê Dynasty, because its name coincided with the title of Lord Trịnh Tạc,[note 1] it was changed to Nam Chân rural district (Nam Chân huyện).
By the 14th year of Minh Mệnh (1833), Nam Chân rural district was separated into Nam Chân and Chân Ninh. About the year of Tự Đức, Chân Ninh rural district (Chân Ninh huyện) was changed as Xuân Ninh rural district (Xuân Ninh huyện). Since the years of Thành Thái, it was continued to change as Trực Ninh rural district (Trực Ninh huyện). During the Nguyễn Dynasty, some parts in the East of this rural district were transferred to Hải Hậu.
From 1971 to 1996, the number of communes continuously decreased due to the merger.
On February 26, 1997, to implement Decree 19/NĐ-CP of the Government of Vietnam, Nam Ninh rural district was re-divided into two new districts : Nam Trực and Trực Ninh.
XXI century
Geography
As of 2003, the district had a population of 196,765.[1] The district covers an area of 143 km2. The district capital lies at Cổ Lễ.[1]
Trần Ngọc Thêm. Cơ sở văn hóa Việt Nam (The Foundation of Vietnamese Culture), 504 pages. Publishing by Nhà xuất bản Đại học Tổng hợp TPHCM. Saigon, Vietnam, 1995.
Li Tana (2011). Jiaozhi (Giao Chỉ) in the Han period Tongking Gulf. In Cooke, Nola ; Li Tana ; Anderson, James A. (eds.). The Tongking Gulf Through History. University of Pennsylvania Press. pp. 39–44. ISBN 9780812205022.
Samuel Baron, Christoforo Borri, Olga Dror, Keith W. Taylor (2018). Views of Seventeenth-Century Vietnam : Christoforo Borri on Cochinchina and Samuel Baron on Tonkin. Cornell University Press. ISBN 978-1-501-72090-1.
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